HIGH SPEED INTERNET MODEM FAMILY
CH2166
-
Send/Retrieve Email. Unlimited Email, V.90
FEATURES
machine interactions. Email allows information to be
conventional analog modem and an Internet
easily transferred between systems, and provides quick
appliance.
low
cost
multi-path
communication.
Replacing
conventional modems and long distance telephone
lines with local access Internet connections saves
ISP.
money by reducing fixed asset and maintenance costs,
and limiting communication expenses.
1000s of local access (POP) numbers world wide.
Protocol (PPP), Password Authentication Protocol
USER FRIENDLY INTERFACE LAYER
(PAP), Challenge Authentication Protocol (CHAP),
The CH2166 iModem provides a robust and user
Domain Name Resolution (DNS), Send Email
friendly API ~ application interface ~ tailored to offer
(SMTP), Retrieve Email (POP3), TCP/IP and UDP
high performance in environments with low bandwidth
to connect to the Internet.
CPUs. It facilitates the implementation of a wide variety
of IP applications and insulates the user from complex
Internet networking details. This API consists of various
@ ® commands that look and feel like conventional
modem AT commands. With the @ ® commands, the
user can perform all standard SMTP and POP3 email
memory.
operations, including: composing, sending, retrieving
and deleting email messages; plus establish BSD style
socket connections. Command results are conveyed via
the iModem’s V.24 (EIA 232-E) serial interface.
Socket connections supported.
OVERVIEW OF THE CH2166 iMODEM
interface.
A conceptual representation of the CH2166 iModem in
an embedded environment is presented in Figure 1. As
V.22bis, V.22A/B V.23, V.21, Bell 212A and 103,
with virtually all Internet enabled devices, the CH2166
(depending on model) and can be used in
iModem requires Internet and ISP configuration
conventional modem mode.
parameters. Among those are email addresses,
authentication
data,
and
telephone
numbers.
Configuration parameters may be specified at the time
of an internet operation or derived from profiles stored
network with 1500 VAC RMS isolation and 2122V
on the CH2166 iModem.
peak surge protection.
Network Protocol Stack. The CH2166 iModem uses a
Listed, reference UL File E104957 (pending).
Network Protocol Stack to perform API commands
operations involving Internet interactions. This protocol
CSA CS-03 Part I approved (pending).
stack is described in Figure 2.
The organization of the stack greatly reduces the
family and modem CH179X/2056 family.
complexity of the commands while providing the user
with unbridled access to the power and flexibility of the
CH2166. When the CH2166 is functioning as an
Internet appliance, multiple iModem applications ~ and
each iModem.
activities using those applications ~ can execute
concurrently.
When the CH2166 is functioning as an analog modem,
INTRODUCTION
the user can only issue standard analog modem
Direct machine-to-machine interaction represents the
commands rather than the complete suite of CH2166
next logical extension of the internet. Cermetek internet
commands. This is because all data flowing from the
modem (iModem) products are designed to leverage
user to the CH2166 ~ via its RS232 Serial Port ~ is
the Internet infrastructure for commercial machine-to-
2007 Cermetek Microelectronics, Inc.
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Document No. 607-0023 Revision A5 (05/07)
Cermetek Microelectronics, Inc.
CH2166 High Speed Internet Modem Family
CH2166
iModem
Product
Internet
Family
(PPP, SMTP, TCP/IP,
POP3)
Configuration Parameters
Functions Performed
Figure 1.
Conceptualized Block Diagram illustrating the Cermetek CH2166 iModem product family
performing the embedded internet application function.
routed directly to the CH2166 modem hardware without
identified by the user. Note that Quick Commands do
interpretation, and is per standard modem operational
not use Session IDs nor are Session IDs used when
procedures and protocols (i.e., the modem transmits
Analog Modem Operation is selected.
the data out the TIP and RING pins to the PSTN).
The user allocates a Session Activity ID by issuing a
Internet Connectivity.
The CH2166 iModem uses
@GIDGET command and frees it by issuing a
Application and Link Profiles to manage configuration
@GIDFREE command. The ID uniquely identifies an
parameters.
Application Profiles contain parameters
application instance as long as it is allocated. Currently,
that apply to all aspects of SMTP and POP3 addressing
email transmission, email retrieval, email storage, and
and
network
connectivity.
Link
Profiles
contain
custom I-Socket applications are supported.
Email
parameters specific to dialup IP link connectivity.
messages of unlimited length can be sent and retrieved
with streaming email. The CH2166 is ideal for
Standard CH2166 commands enable the user to easily
applications requiring overlapping Internet operations,
distinguish instances of iModem applications, permit
storage of large amounts of data (300K bytes static
multiple simultaneous TCP connections, and allow
memory and 1.7M bytes volatile memory), and the
virtually all configurable parameters to be specified as
flexibility of BSD style socket operations.
part of the command. Quick CH2166 commands, by
contrast, allow few parameters to be specified as part of
Application Profiles.
The CH2166 stores network
the command but perform all underlying network
connectivity,
email
address,
and
authentication
connectivity operations automatically.
configuration parameters in Application Profiles. These
AP Profiles are in static CH2166 memory and are
Analog Modem Operation. The CH2166l operates
unaffected by power loss. A complete list of available
strictly as an analog V.90 modem when this function is
Application and Link Profiles can be found in Table II.
selected. It is controlled with industry standard Hayes
AT commands in this case.
Refer to Cermetek
AP Profiles can be modified with Profile Management
Document # 613-0001, AT Commands and S-
Commands (see Table I), or modified externally with
Registers, for AT commands supported by the CH2166.
any ASCII editor and then downloaded to the CH2166
via the serial port. Typical PC ASCII editors, such as
MS NotePad , may be used edit these files. Contact
®
BASIC INTERNET APPLIANCE OPERATION
Cermetek for Download assistance.
Session Activity ID. A Session Activity ID is used to
uniquely identify each instance of an iModem
There are four basic Application Profiles:
application when Standard commands are used and
Internet Appliance operation is selected.
TCP/IP configuration and email address data, such
This allows multiple iModem applications to be easily
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
USER API INTERFACE
SMTP
POP3
SOCKETS
API
API
API
FILE
MODEM
SMTP
POP3
SOCKETS
DNS
MEMORY
API
INTERFACE
MANAGEMENT
TCP
UDP
API
IP
PPP
MODEM
DYNAMIC
STATIC
MEMORY
MEMORY
Figure 2.
CH2166 Network Protocol Stack.
and provide robust flow control. A default iModem
as the SMTP server name , TCP Port number, and
AP Profiles is used unless another one is specified.
STMP authentication data if necessary.
Both short and long forms of Standard Commands
are supported and may be used interchangeably.
TCP/IP configuration and authentication data, such
as the POP3 server name and authentication data.
user CH2166 interactions and are provided as a
AP
Profile.
This
profile
supplies
convenience for experimentation and prototyping.
configuration and possibly authentication data for
A default iModem AP profile is used unless another
custom applications that use I-Sockets. It specifies
one is specified. No other instance of an iModem
information such as Internet servers, TCP port
application can be executing when one of these
numbers and possibly authentication data.
commands is used (i.e., No Session Activity ID is
used with these commands.)
data for dialup IP connections. It specifies
information such as telephone numbers and ISP
commands are used to select Internet Appliance or
authentication data.
Analog Modem operation. They are specialized
commands that toggle CH2166 device function
Default AP profiles are provided by Cermetek. Most of
between the two kinds of operation. No Session
the configuration parameters in the AP profiles can be
Activity ID is used with these commands.
overridden
by
specifying
them
as
command
parameters.
Configuration parameters specified as
The CH2166
command parameters have precedence over those
supports numerous internal file management
contained in the AP Profiles.
commands. These commands manage files stored
in both static and volatile memory. Both short and
Command Structure. There are four basic types of
long forms of the commands are supported and
CH2166 commands as described below. Standard and
may be used interchangeably.
Quick commands are used when Internet Appliance
operation is selected. Hayes compatible AT commands
Command Architecture. The structure of Application
are used when Analog Modem operation is selected.
and Link profiles makes it possible access the contents
There
are
also
some
auxiliary
commands
for
for the entire set of associated Application and Link
configuring the device, toggling between Analog
profiles by referencing only a single profile name (i.e,
Modem and Internet Appliance operation and general
Profiles in the same set or suite contain transparent
file management.
internal linkage). Parameters specified as part of a
command have precedence over those specified in a
Refer to Table I for a brief description of all commands
profile. Command results, diagnostics, and error
supported by the CH2166.
notifications are conveyed to the user via the serial port.
Send and Retrieve Email. The CH2166 has the ability
of virtually all relevant configuration parameters,
to send and retrieve email of unlimited length. Once a
streaming email transmission session is set up, the
2007 Cermetek Microelectronics, Inc.
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Document No. 607-0023 Revision A5 (05/07)
Cermetek Microelectronics, Inc.
CH2166 High Speed Internet Modem Family
user just sends data to the CH2166 ~ one line at a time
Contact Cermetek and ask for the CH2166 iModem
~ for as long as desired. The @ETXDEND command is
Evaluation Board.
used to end the streaming email session. Alternatively,
data in files on the CH2166 can be sent with the
@ETXFILE command.
iMODEM CONTROL METHODOLOGIES
®
@
commands
are
conveyed
from
the
user
Storage Memory. A total of 300K bytes of Flash RAM
environment to the CH2166 via the serial port. The
or static memory is available for permanent storage of
CH2166 processes received commands based on
files on the CH2166.
There is also 1.7M bytes of
configuration parameters specified as part of the
volatile memory or dynamic RAM available for
command, and in the effective Link and Application
temporary file storage on the CH2166.
profiles. Parameters specified as part of a command
have precedence over those in profiles. See Table I for
Email messages may include files from either static or
a summary of available @ Commands. User Control
®
dynamic RAM memory, at the user’s discretion.
of
operations
that
involve
networking
or
communications
falls
into
the
following
general
Refer to Cermetek document, CH2166: Commands,
categories:
Profiles and Examples, for more details.
iModem Hardware Configuration.
Each CH2166
with a single command and the underlying
iModem contains a fully functional 56kbps modem and
networking and communications operations are
the hardware and firmware needed for Internet
automatically performed without user interactions.
connectivity and functionality. The unique architecture
This type of control applies mostly to Quick
of Cermetek iModems enables the CH2166 iModem to
commands which do not use a Session Activity ID.
operate as either an Internet Appliance or as a high
reliability Analog Modem.
usually Standard Commands ~ are used to perform
The CH2166 iModem Family of products are pin
networking and communications operations such
compatible with the CH179X and CH2056 modem
as establishing and releasing TCP connections.
products. Referring to Figure 3, the CH2166 iModem
This type of control allows CH2166 networking and
Family consists of an industrial grade high speed
communications operations to be distributed in a
modem module and a µP controller with associated
way that is tailored to needs of the user’s
internal logic. The µP controller and the logic provide
application.
all the functions required for internet communication via
standard PSTN telephones lines.
The CH2166
Passive Network Control.
The type of control
contains an additional 8 Mbytes of RAM and 2 Mbytes
requires that the user simply monitor the result of the
of Flash RAM.
operation corresponding to a CH2166 command. (i.e.
The host does not participate in networking or
Required External Connections.
The CH2166
communications operations.) After the user issues a
iModem requires an external RJ-11C jack for the PSTN
CH2166 command, the CH2166 generates a POSTED
line connection.
An ITU-T V.24 serial interface is
message to indicate the operation has started.
required when host processor control of the iModem is
Subsequently the CH2166 will automatically handle all
required in the specific application. All retrieved emails
aspects of the operation and report the outcome when it
are presented to the host system for further processing
is complete. Consequently, the host CPU has much
and/or retention via the serial interface.
spare bandwidth because it only needs to monitor the
operation outcome. The CH2166 generates an OK
Approvals. The CH2166 iModem Family is FCC Part
message to report a successful operation and an
68 approved, UL 60950 and CSA C22.2 950 (Third
ERROR message with a diagnostic code otherwise.
Edition) listed and Industry Canada CS-03 approvable.
Configuration parameters are derived from Application
Physical Dimensions. The modules are designed for
and Link profiles and specified with commands as with
PCB through-hole mounting and are 1.35” x 1.97” x
all other @ commands. Execution of a CH2166 email
®
0.55” in size.
command typically involves the following steps. The
®
User ~ host processor ~ issues the appropriate @
command. The CH2166 establishes dialup/PSTN and
iMODEM EVALUATION BOARD
PPP connections with the ISP and performs any
Cermetek manufactures a companion evaluation board
necessary authentication. The CH2166 establishes a
that is designed to simplify the hardware connections
TCP connection and SMTP connection with an email
required to program the iModem as well as providing a
server. The CH2166 transfers the email message over
reliable platform to assist with system level debugging.
the TCP
connection.
The
CH2166 releases all
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Flash ROM
µP
2Mx8
Network
Flash ROM
Protocols
Stack
32Kx8
RAM
8Mx8
CH2166
MODEM
RXD
TIP
RTS
SERIAL
V.90
DAA
DCD INTERFACE
PSTN
DSR
V-24
Ring
RI
EIA-232-E or
CTS
UART
TXD
DTR
MODEM INTERFACE
RST
SPK
+5V
GND
Figure 3. Functional Block Diagram of Cermetek CH2166 iModem Products.
connections and notifies the user of the operation
iMODEM TRANSACTION EXAMPLES
outcome by issuing an OK or ERROR response over
The following examples are intended to illustrate
the serial port.
general usage of the CH2166. For a more detailed
discussion of the commands, refer to Cermetek
Active Network Control. The user issues individual
document,
CH2166:
Commands,
Profiles
and
CH2166 commands and is notified of their outcome as
Examples.
in the Passive Network Control case. The essential
difference is that commands are used to perform
In the following examples, Enter indicates the
specific operations such as establishing an STMP
command or instruction(s) sent to the CH2166 from the
server connection or transferring an email message.
Host Controller via the CH2166’s serial interface port.
The typical sequence of commands used to transfer an
Result indicates a response generated by the CH2166
email message is as follows:
and sent to the Host Controller via the CH2166’s serial
1. Issue a command to begin an SMTP session.
interface port (or the action taken by the CH2166).
2.
Issue a command to establish a TCP connection
Commands,
actions,
are
in
bold;
and the underlying ISP dialup connection with an
descriptions/explanations are non-bolded.
SMTP server.
3. Issue a command to transfer a file containing an
email message.
IMPORTANT NOTE
4. Issue a command to release the TCP and all other
AS DELIVERED FROM THE FACTORY, the CH2166
connections.
default DCE speed is set at 19.2K bps, 8-N-1. Be
5. Issue a command to end the SMTP session.
sure to configure the host processor (DCE) to match
these parameters or the CH2166 will not properly
A Session Activity ID is used to identify the instance of
communicate with the host.
the iModem email transmission session. The CH2166
issues a POSTED message to indicate execution of
each command has started, and an OK or ERROR to
notify the user of the command outcome.
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CH2166 High Speed Internet Modem Family
PROFILE MANAGEMENT EXAMPLES
EXAMPLE 1B. Change the POP3 server to be used in
The CH2166 comes from the factory with pre-
the UUNET Application Profile.
configured Application and Link profiles which are listed
in table II.
Application profiles apply to Internet
Enter:
@ERXC: PROFILE=pop3.uunet
applications such as SMTP, and Link profiles apply ISP
SERVER=TEXT-pop3.pop.net<CR>
dialup connectivity and authentication. The default
Result:
POSTED: Indicates the CH2166 has
iModem profile is configured to work with Cermetek’s
received
and
begun
executing
the
ISP and its Internet servers.
command.
Result:
OK: The CH2166 indicates the command
The user can customize profiles using with Profile
succeeded
Management commands listed in Table. Note that
these commands do not use a Session Activity ID.
EXAMPLE 1C. Change the local ISP access telephone
number in the UUNET Link Profile.
IMPORTANT NOTE
Enter:
@LINKC: LEVEL=LINK
All profile changes made with the @ETXC , @ERXC ,
PROFILE=link.imodem.uunet
and @LINKC commands are permanent and
PHONE=9,1,408,555,1212<CR>
unaffected by power loss.
Result:
POSTED:
Indicates the CH2166 has
received
and
begun
executing
the
command.
Result:
OK: TheCH2166 indicates the command
SMTP Application profiles may be customized by
succeeded.
issuing the @ETXC command with the parameters to
be modified. An OK response from the CH2166
indicates
the
parameter
changes
have
been
successfully completed (i.e., a POSTED message from
EMAIL TRANSMISSION EXAMPLES
the CH2166 indicates execution of the command has
Each email file stored on the CH2166 has a unique
started).
name. The user must specify the file name when
issuing a command to send a email file.
POP3 Application profiles may be customized by
issuing the @EXRC command with the parameters to
Examples 2A and 2B below illustrate alternative
be modified. POSTED and OK responses from the
methods for sending an email message. In Example
CH2166 have the same significance as with the
2A, a Quick Command is used, and in Example 2B
@ETXC command above.
Standard Commands are used.
Link Profiles may be customized by issuing the
EXAMPLE 2A. Send an existing file containing email
@LINKC command with the parameters to be modified
with a Quick Command
The CH2166 will use the
specified on the command line. POSTED and OK
default iModem SMTP Application profile since one is
responses
from
the
CH2166
have
the
same
not specified The file test does not contain email
significance as with the @ETXC and @ERXC above.
header information (i.e., TO:, FROM:, SUBJECT:, etc.)
Consequently header data will be derived from the
Examples 1A, 1B and 1C illustrate the use of the
application profile.
@ERXC , @ETXC , and @LINKC commands to modify
profile parameters.
Enter:
@QTM: FILE=test<CR>
Result:
POSTED: Indicates the CH2166 has
received
and
begun
executing
the
IMPORTANT NOTE
command
The @ETXC, ERXC, and @LINKC command options
Result:
OK: Mail sent. The CH2166 indicates
are case sensitive.
that email message test has been sent
successfully and the diaulup and all
EXAMPLE
1A.
Change
the
SMTP
server
protocol
connections
have
been
authentication method used in the UUNET Application
released.
Profile.
EXAMPLE 2B. Send an existing file containing email
Enter:
@ETXC: PROFILE=smtp.uunet
with a sequence Standard Commands. A Session
AUTH_METHOD=ANY<CR>
Activity ID is used to uniquely identify this instance of
Result:
POSTED:
Indicates the CH2166 has
the email transmission application. The CH2166 will
begun executing the command.
use the default iModem SMTP application profile as in
Result:
OK: The CH2166 indicates the command
the previous example,. and the file test does not
succeeded.
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
contain email header information (i.e., TO:, FROM:,
the IP Link ~ and the underlying PSTN/PPP connection
SUBJECT:)
~ would have been preserved if another application
instance had been using the IP Link.
Enter:
@GIDGET: TX_MAIL<CR>
Result:
POSTED: Operation started.
Sending Streaming Email.
The user can send
Indicates the CH2166 has received and
streaming
email
by
issuing
the
@QTX Quick
begun executing the command.
Command; or by issuing the Standard @ETXDSTART
Result:
OK[1]: E-Mail Transmission Session ID
command to initiate the streaming email session and a
Allocated.
The
CH2166
indicates
series of @EXTDEND commands to send lines of data.
Session
Activity
ID
1
has
been
See Examples 3A and 3B.
successfully allocated.
Enter:
@ETXCONN[1]: <CR>
EXAMPLE 3A. Send a streaming email message with
Result:
POSTED[1]:
Operation
started.
a Quick Command. Email header information ~ TO:,
Indicates the CH2166 has received and
FROM:, SUBJECT:, etc. ~ is defined from the default
begun executing the command.
iModem SMTP application profile.
Result:
OK[1]: E-Mail Transmission Service
Ready. The CH2166 indicates that IP
Enter:
@QTX:<CR>
connectivity with the ISP is successfully
Result:
POSTED: Indicates the CH2166 has
established.
Also,
the
requisite
received and begun executing command.
underlying PSTN and PPP connections
Result:
OK: Begin sending E-Mail.
The
are established.
CH2166
indicates
streaming
email
Enter:
@ETXFILE[1]: FILE=test<CR>
transmission can begin. All the necessary
Result:
POSTED[1]:
Operation
started.
protocol and PSTN connections are
Indicates the CH2166 has received and
established.
Subsequently,
the
user
begun executing the command..
issues lines of ASCII data. The <CTL>D
Result:
OK[1]: E-Mail successfully sent The
indicates the end of the email message.
CH2166 indicates that email transmission
Enter:
This is a test message<CR>
succeeded.
Enter:
sent using the Streaming<CR>
Enter:
@ETXDISC[1]:<CR>
Enter:
Email CH2166 Quick<CR>
Result:
POSTED[1]:
Operation
started.
Enter:
Command.<CR>
Indicates the CH2166 has received and
Enter:
<CTL>D
begun executing the command.
Result:
OK: Mail sent. The CH2166 indicates
Result:
OK[1]: E-Mail transmission service
that streaming email message has been
finished. The CH2166 indicates the IP
sent successfully. All protocol and PSTN
connection and the underlying protocol
connections are released.
and PSTN telephone connections are
released
EXAMPLE 3B.
Send streaming email using a
Enter:
@GIDFREE[1]:<CR>
sequence of Standard Commands. A Session Activity
Result:
POSTED[1]:
Operation
started.
ID is allocated and used to identify this instance of
Indicates the CH2166 has received and
iModem email transmission application. All necessary
begun executing the command.
parameters except the destination email address are
Result:
OK[1]: E-Mail Transmission Session ID
derived from the default iModem SMTP application.
freed.
The CH2166 indicates the
Session Activity ID has been released.
Enter:
@GIDGET: TX_MAIL<CR>
Result:
POSTED: Operation started. Indicates
Note that in Example 2A all the requisite underlying
the CH2166 has received and begun
operations occurred transparently after the @QTM
executing the command.
command was issued to the CH2166. By contrast, in
Result:
OK[2]: Session ID Allocated.
The
Example 2B, a sequence of Standard Commands were
CH2166 indicates that Session Activity ID
used to perform the same task. Also, a Session Activity
2 has been successfully allocated.
ID was allocated ~ via the @GIDGET command ~ and
Enter:
@ETXCONN[2]: <CR>
used to email transmission application instance. All
Result:
POSTED[2]:
Operation
started.
necessary configuration parameters were derived from
Indicates the CH2166 has received and
the default iModem SMTP application profile in both
begun executing the command.
cases.
Result:
OK[2]: E-Mail transmission Service
Ready. The CH2166 indicates that IP
In example 2B, the test email file was sent with the
connectivity is successfully established.
@ETXFILE command after IP connectivity was
Also, the underlying protocol and PST
established. The @ETXDISC released the IP link and
telephone connections are established.
all other protocol and physical connections. Note that
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Enter:
@ETXDSTART[2]:
Retrieving Email. All email messages cached by the
TO=xxxx@yyy.com<CR>
POP3 server are numbered starting with 1.
The
Result:
POSTED[2]:
Operation
started.
numbers are an ascending sequence of integers
Indicates the CH2166 has received and
without gaps.
begun executing the command.
Result:
OK[2]: Ready to start streaming email.
The CH2166 can retrieve email from any POP3 server
The CH2166 indicates that streaming
which conforms to the relevant Internet RFCs and does
email transmission data can begin and
not use proprietary email protocols. The user must
that an SMTP server connection is
specify a valid message number.
A list of valid
established.
message numbers can be obtained with the Standard
@ERXLIST Command.
IMPORTANT NOTE
The data in an email message is conveyed to the user
The @EXTDATA command must be executed for
via the CH2166 serial port as it arrives from the POP3
each line of ASCII data to be sent.
server.
EXAMPLE 4A. Retrieve email message number 1 with
Enter:
@ETXDATA[2]: This is a<CR>
a Quick Command. The necessary configuration
Result:
POSTED[2]:
Operation
started.
parameters are derived from the default iModem POP3
Indicates the CH2166 has received and
Application Profile.
begun executing the command.
Result:
OK[2]: Data sent.
CH2166 indicates
Enter:
@QRX: MSG=1<CR>
that ASCII data has been sent.
Result:
POSTED: Indicates the CH2166 has
Enter:
@ETXDATA[2]: test.<CR>
received
and
begun
executing
the
Result:
POSTED[2]:
Operation
started.
command.
Indicates the CH2166 has received and
Result:
OK: Connected to E-Mail Retrieval
begun executing the command.
Server.
The CH2166 indicates that a
Result:
OK[2]: Data sent.
CH2166 indicates
POP3 server connection is established
that ASCII data has been sent.
and authentication succeeded. Lines of
Enter:
@ETXDEND[2]: <CR>
ASCII data will arrive one at a time as
Result:
POSTED[2]:
Operation
started.
they arrive until a <CTL>D character is
Indicates the CH2166 has received and
received.
begun executing the command.
Result:
This is test data from email<CR>
Result:
OK[2]: Streaming email completed.
message 1.<CR>
The CH2166 indicates the streaming
Best Regards.<CR>
email message has been successfully
<CTL>D<CR>
sent and the. SMTP server connection is
Result:
END: Email retrieval succeeded. The
released
CH2166
indicates
that
retrieval
of
Enter:
@ETXDISC[2]: <CR>
message 1 is complete and successful
Result:
POSTED[2]:
Operation
started.
Also, all protocol and PSTN telephone
Indicates the CH2166 has received and
connections are released.
begun executing the command.
Result:
OK[2]: E-mail Transmission service
<CTL>D ~ the <EOT> character ~ is the message
finished. The CH2166 indicates that all
termination character.
protocol
connections
and
PSTN
telephone connections are released. In
EXAMPLE 4B. Retrieve email message number 1 with
the case another application instance is
a sequence of Standard Commands. A Session Activity
using the IP Link, the IP Link and
ID is used to identify this instance of iModem email
underlying
protocol
and
telephone
retrieval application.
All necessary parameters are
connections are not released.
derived from the default iModem POP3 application
Enter:
@GIDFREE[2]: <CR>
profile.
Result:
POSTED[2]:
Operation
started.
Indicates the CH2166 has received and
Enter:
@GIDGET: RX_MAIL<CR>
begun executing the command.
Result:
POSTED: Operation started. Indicates
Result:
OK[2]:
E-Mail
transmission
ID
the CH2166 has received and begun
released.
The CH2166 indicates that
executing the command.
Session Activity ID is released.
Result:
OK[3]: E-Mail Retrieval Session ID
Allocated. The CH2166 has allocated
Session Activity ID 3.
Enter:
@ERXQCONN[3]: <CR>
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Result:
POSTED[3]:
Operation
started.
Result:
POSTED[3]:
Operation
started.
Indicates the CH2166 has received and
Indicates the CH2166 has received and
bug execution of the command.
begun executing the command.
Result:
OK[3]: E-Mail connection established.
Result:
OK[3]: E-Mail connection released.
The CH2166 indicates a POP3 server
The CH2166 indicates the POP3 server,
connection
is
established
and
all
other
protocol,
and
the
PSTN
authentication succeeded. Also, the other
telephone connections are released. An
underlying protocol connections and a
exception is the case where another
PSTN
telephone
connection
are
application instance is using the IP link.
established.
In that case the IP link and underlying
Enter:
@ERXLIST[3]:
format=LONG
<CR>
protocol and PSTN telephone connection
List the email messages currently cached
are preserved.
on the POP3 server.
Enter:
@GIDFREE[3]:<CR>
Result:
OK[3]: Operation started. Indicates the
Result:
POSTED[3]:
Operation
started.
CH2166
has
received
and
begun
CH2166 indicates that the command has
executing . The list of cached messages
been received and action has been
will follow.
taken.
Result:
START[3]:
Result:
OK[3]:
E-Mail Retrieval Session ID
Result:
L[3]: 1 1024 Mon, 1 Jan 2004 14:12:10
released.
CH2166
indicates
that
–0800 <joe@isp.com> Livestock
Session Activity ID is released.
Result:
L[3]: 2 2099 Mon, 1 Jan 2004 14:12:20
–0800 <mae@isp.com> Stock
In example 4A the @QRX Quick Command is used to
Result:
L[3]: 3 3125 Mon 1 Jan 2004 14:12:30 –
perform the same task as a sequence of Standard
0800 <bill@isp.net> Watches
commands in example 4B. In example 4B, the
Result:
END[3]: The END message from the
@ERXQCONN is the command that actually initiates
CH2166 indicates that the list is complete
email message retrieval.
and the operation succeeded.
The difference between example 4A and 4B is that the
IMPORTANT NOTE
@ERXCONN Standard command is used to establish a
The CH2166 requires the user to specify the
POP3 server connection before email is retrieved. This
maximum number of data bytes that can be retrieved
allows the user to issue a @ERXLIST command and
with a single @ERXDATA command to prevent buffer
determine
what
messages
are
cached
before
overflows. The valid range is from 1 to 1000.
attempting to retrieve a message.
Delete Email. The user can delete a single or multiple
Enter:
@ERXMAIL[3]: MSG=1 MAX=128 <CR>
email messages with the @ERXDELETE command as
long as the message numbers are known.
Result:
POSTED[3]: Operation started Indicates
the CH2166 has received and begun
executing the command.
EXAMPLE 5. Delete email messages 2 - 4 (inclusive)
Result :
OK[3]: Ready to retrieve E-Mail data.
using sequence of Standard Commands. The Session
The CH2166 indicates that the message
Activity ID identifies this instance of the iModem email
number is valid and the user can begin
retrieval application.
The default iModem POP3
retrieving data 1 with the @ERXDATA
application profile is used to derive all the necessary
command. A maximum of 128 bytes can
parameters.
be retrieved in a single operation.
Enter:
@ERXDATA[3]:
Enter:
@GIDGET: RX_MAIL<CR>
Result:
POSTED[3]: Operation Started.
Result:
POSTED: Operation started. Indicates
Result:
OK[3]: 17: This is data from<CR>
the CH2166 has received and begun
Enter:
@ERXDATA[3] .
executing the command.
Result:
POSTED[3]: Operation Started.
Result:
OK[3]: E-Mail retrieval Session ID
Result:
OK[3]: 11: message 1.<CR>
Allocated. The CH2166 indicates that
Enter:
@ERXDATA[3]
Session Activity ID has been allocated.
Result:
POSTED[3]: Operation Started.
Enter:
@ERXQCONN[3]: <CR>
Result:
END[3]: E-Mail Message retrieved.
Result:
POSTED[3]:
Operation
started.
The
CH2166
indicates
the
email
Indicates theH2166 has received and
message is completely and successfully
begun executing the command .
retrieved.
Result:
OK[3]: Connected to E-Mail Retrieval
Enter:
@ERXDISC[3]:<CR>
Server. The CH2166 indicates a POP3
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CH2166 High Speed Internet Modem Family
server connection is established and
operations are conveyed to the user via the CH2166
authentication succeeded.
serial port.
Enter:
@ERXDELETE[3]: LIST=2-4<CR>
Result:
POSTED[3]:
Operation
started.
I-SOCKETS Discussion. The most common use of I-
Indicates the CH2166 has received and
SOCKETS is for custom iModem applications to
begun executing the command.
exchange data with Internet servers over a TCP/IP
Result:
OK[3]: Message Deleted <CR>
The
connection. The following information must be known
CH2166
indicates
that
the
email
before this is possible:
messages
have
been
flagged
for
deletion. Messages are not actually
1. The IP address or Symbolic Name of the target
deleted
unless
the
@ERXDISC
Internet server.
command succeeds.
2. The TCP port number of the target application on
Enter:
@ERXDISC[3]:<CR>
that server.
Result:
POSTED[3]:
Operation
started.
Indicates the CH2166 has received and
Additionally, a CH2166 I-Sockets Session Activity ID is
begun executing.
required.
Result:
OK[3]: E-Mail connection released.
The CH2166 indicates the POP3 server
EXAMPLE 6. Send and Receive data using with I-
and TCP connections are released. Also,
Sockets. In this case a POP3 server connection is
the IP Link and underlying PSTN
established and all parameters except the server name
telephone are released unless they are
and TCP port number are derived from the AT&T Link
being
used
by
another
application
profile.
instance. Finally this message confirms
that messages 2 – 4 are deleted from the
Enter:
@GIDGET: ISOCKET<CR>
POP3 server.
Result:
POSTED: Operation started. Indicates
Enter:
@GIDFREE[3]:<CR>
the CH2166 has received and begun
Result:
POSTED[3]:
Operation
started.
executing the command.
Indicates the CH2166 has received and
Result:
OK[1]:
I-SOCKET
Session
ID
begun executing the command.
Allocated. The CH2166 indicates that
Result:
OK[3]: E-Mail Retrieval Session ID
Session Activity ID is allocated for this
freed released. The CH2166 indicates
instance of an I-Socket application.
that Session Activity ID is freed.
Enter:
IS_SOCKET[1]:
RMAX=5000
TMAX=5000<CR>
Result:
POSTED[1]:
Operation
started.
OPEN SOCKET: I-SOCKET EXAMPLES
Indicates the CH2166 has received and
The following examples illustrate general usage of
begun executing the command.
CH2166 I-SOCKETS. I-SOCKETS provide virtually the
Result:
OK[1]: Socket Allocated. The CH2166
same functionality as Berkley Sockets (BSD). For a
indicates a BSD style socket descriptor
more detailed discussion of the commands, refer to
has been successfully allocated and
Cermetek document, CH2166: Commands, Profiles and
associated with the Session Activity ID.
Examples.
Also, the maximum time for a socket read
or write operation to complete is 5000
In the following examples, Enter indicates the
milliseconds.
command or instruction(s) sent to the CH2166 from the
Enter:
IS_IPCONNECT[1]:
Host Controller.
Result indicates what the CH2166
PROFILE=LINK.ATT<CR>
sends back to the Host Controller (or the action taken
Result:
POSTED[1]:
Operation
started.
by the CH2166). Commands, actions, results are in
CH2166 indicates that the command has
bold; descriptions/explanations are non-bolded.
been received and action has been
initiated.
I-SOCKETS Definition. Generally, sockets provide a
Result:
OK[1]: IP Link is up. The CH2166
well known set of functions for performing TCP/IP
indicates an IP Link with the ATT ISP is
communications and related operations. I-SOCKETS
established. This includes establishing
have the same TCP/IP connection management
the underlying PPP and PSTN telephone
capabilities as BSD style sockets and virtually the same
connections.
semantics. The only significant difference is that a user
Enter:
IS_GETHOSTBYNAME[1]:
initiates SOCKETS operations by issuing I-SOCKETS
NAME=postoffice.att.net<CR>
commands over the CH2166 serial port rather calling
Result:
POSTED[1]:
Operation
started.
subroutines. Similarly, the results of I-SOCKETS
Indicates the CH2166 has received and
begun executing the command.
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CH2166 High Speed Internet Modem Family
Result:
OK[1]: 65.200.205.193.
The CH2166
PSTN
telephone
connection
are
indicates the POP3 server IP address is
released.
65.200.205.193.
Enter:
@GIDFREE[1]:<CR>
Enter:
IS_CONNECT[1]
PORT=110
Result:
POSTED[1]:
Operation
started.
SERVER=IPV4-65.200.205.193<CR>
Indicates the CH2166 has received and
Result:
POSTED[1]:
Operation
started.
begun executing the command .
Indicates the CH2166 has received and
Result:
OK[1]: I-Socket Session ID freed. The
begun executing the command.
CH2166 indicates that Session Activity ID
Result:
OK[1]: TCP socket connected.
The
is freed.
CH2166 indicates a TCP connection with
the POP3 server is established.
ANALOG MODEM OPERATION
This section describes operation of the CH2166 as a
stand alone analog modem.
Additionally, several
IMPORTANT NOTE
examples are provided that illustrate its usage as a
The CH2166 requires the user to specify the
Modem.
The CH2166 supports Hayes compatible
maximum number of bytes of data which may be
commands which are listed in the TIA/EIA 602-A
retrieved by each IS_RECV command.
This is
standard and described in the ITU-T V.250 standard.
necessary to prevent buffer overruns. A value of at
For a more detailed discussion of the commands, refer
least 128 bytes is recommended.
to Cermetek document, CH2166: Commands, Profiles
and Examples.
Enter:
IS_RECV[1]: MAX=256<CR>
Device Function.
The CH2166 is a dual function
Result:
POSTED[1]: Indicates the CH2166 has
device. It can operate as an Analog Modem or as an
received
and
begun
executing
the
Internet Appliance. However, these two operations are
command.
mutually exclusive and can not be intermingled.
Result:
OK[1]
20:OK+
POP3
greeting.<CR><LF>
The
CH2166
Internet Appliance operation is the default CH2166
outputs the 20 byte POP3 server greeting
function. The @IMENTER command selects CH2166
over the serial port.
Analog Modem operation. No Session ID is required
Enter:
IS_SEND[1] 6:quit<CR><LF>
for Modem Operation. During Modem Operation only
Result:
POSTED[1]:
Operation
started.
modem AT commands and operations, and the
Indicates the CH2166 has received and
selection of Internet Appliance operation are possible.
begun execution of the command.
Result:
OK[1] 6: <CR> . The CH2166 indicates 6
As with all modems, when in Analog Modem Operation
bytes
of
data
were
successfully
the CH2166 function in either of the following two
transmitted.
modes: Data Mode or Command Mode. In Data Mode,
Enter:
IS_RECV[1]: MAX=256<CR>
there is no interpretation of data flowing through the
Result:
POSTED[1:
Operation
Started.
CH2166 serial port. In Command Mode, the CH2166
Indicates the CH2166 has received and
interprets all ASCII strings flowing through the serial
begun executing the command.
port as industry standard Hayes AT commands (which
Result:
OK[1] 9:OK+ Bye<CR><LF>
it tries to execute). All AT commands supported by the
The CH2166 outputs the 9 byte POP3
CH2166 are listed in the Cermetek Document # 613-
server sign off message. This terminates
0001, AT Commands and S-Registers.
the POP3 server connection.
Enter:
IS_CLOSE[1]:<CR
Successful execution of the @IMENTER command
Result:
POSTED[1]: Indicates the CH2166 has
selects Analog Modem operation and puts the CH2166
received
and
begun
executing
the
in Command mode. Several AT commands can switch
command.
the CH2166 to Data mode: for example, the ATD
Result:
OK[1]: TCP socket released.<CR> The
command. Consistent with industry standard modem
CH2166 indicates the TCP connection
operation, the CH2166 can be toggled from Data Mode
and the socket descriptor are both
to Command Mode by entering the +++ string while in
released.
Data Mode. Also, the CH2166 can be toggled from
Enter:
IS-IPRELEASE[1]:<CR>
Command Mode back to Data Mode with the ATO
Result:
POSTED[1]:
Operation
started.
command under the appropriate conditions.
Indicates the CH2166 has received and
begun executing the command.
The @IMEXIT command is used to select Internet
Result:
OK[3]: IP Link is Down. The CH2166
Appliance operation during Analogue Modem operation
indicates that IP link and underlying
and can only be entered when the CH2166 is in
Command Mode.
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CH2166 High Speed Internet Modem Family
Result:
OK Command accepted.
AT Command Format. CH2166 modem commands
Enter:
@IMEXIT<CR>
consist of three elements:
Result:
POSTED: Operation started. Indicates the
1. The attention sequence,
CH2166 has received and begun executing
2. The commands themselves and
the command.
3. A terminating carriage return.
Result:
OK: iModem Operation Initiated. The
EXAMPLE 7A. Tone dial a telephone number.
CH2166
indicates
Internet
Appliance
Enter:
ATDT1234567<CR>
operation is successfully selected.
Result:
Modem goes off-hook
AT [Commands]<CR>.
APPLICATION PROFILE EXAMPLES
Where: AT represents attention sequence. A and T
The CH2166 uses Application Profiles containing
may be either upper or lower case but must be
configuration
parameters,
such
as
Login
IDs,
the same case.
[ Command ] represents
Passwords,
email
addresses,
etc.;
and
other
command strings.
parameters needed for network connectivity operations.
Cermetek provides default iModem profiles for the
Where: <CR> represents carriage return (ASCII 13 or
standard iModem applications: email transmission and
HEX 0D)
retrieval. If another profile is not specified, the default
<LF> represents line feed (ASCII 10 or HEX
iModem application profile supplies parameters during
0A)
CH2166 command execution and is the effective
profile. Otherwise, the specified profile is the effective
Automatic Answering.
The CH2166 can be
profile and supplies parameters during CH2166
configured to automatically answer an incoming phone
parameter execution. Cermetek customizes standard
call by setting register S0 to an integer value between 1
Application profiles upon customer request.
and 255. This is only possible when Analog Modem
Configuration parameters can be overridden by
operation is selected.
specifying them as part of a command. Parameter
values specified as part of a CH2166 @ command
®
EXAMPLE 7B. Set CH2166 to answer after 3 incoming
remain effective for the lifetime of any protocol
rings.
connection resulting from execution of the command.
Enter:
ATS0=3<CR>
The examples below illustrate how parameters are
Result:
OK
specified as part of a command.
When S0 is set to 0, the CH2166 will not auto-answer.
EXAMPLE 8A. In this case, the destination email
address is specified as part of @QTM command The
email file is sent with this Quick Command. All
IMPORTANT NOTE
configuration parameters except the destination email
The CH2166 can only answer an incoming call when
address are derived from the default iModem SMTP
Analog Modem Operation has been selected with
application profile. The email file is test . And does not
via the @IMENTER command.
contain email header information ~ TO:, FROM:,
SUBJECT:, etc.
EXAMPLE 7C.
Set the CH2166 to answer after 2
Enter:
@QTM: FILE=test
incoming rings.
Assume Activity Session ID 1 is
TO=staff@cermetek.com<CR>
allocated and Internet Appliance operation is selected.
Result:
POSTED: Indicates the CH2166 has
received
and
begun
executing
the
Enter:
@GIDFREE[1]<CR>
command.
Result:
POSTED: Operation started. Indicates the
Result:
OK: Mail sent. TheCH2166 indicates
CH2166 has received and begun executing
that email message test has been sent
the command.
successful and all protocol and telephone
Result:
OK[1]: Session ID freed. The CH2166
connections are released.
indicates the Session Activity ID is freed.
Enter:
@IMENTER: <CR>
EXAMPLE 8B. In this case the ISP telephone number
Result:
POSTED: Operation started.
Indicates
is specified as part of @QTM command. The email file
the CH2166 has received and begun
is sent with this Quick Command. The email file to be
executing the command.
sent is test and all configuration parameters except the
Result:
OK: Modem Operation Initiated. The
telephone number are derived from the default iModem
CH2166 indicates Analog Modem operation
SMTP application profile.
is successfully selected.
Enter:
AT<CR> Modem attention sequence.
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CH2166 High Speed Internet Modem Family
Enter:
@QTM: FILE=test
3. Input/Output interface circuitry.
TO=staff@cermetek.com<CR>
4. V.90 Internal modem.
Result:
POSTED: Indicates the CH2166 has
5. Modem interface circuitry.
received
and
begun
executing
the
6. DAA (Data Access Arrangement) PSTN interface.
command.
7. Additional Flash RAM.
Result:
OK: Mail sent. The CH2166 indicates
8. Additional RAM.
that email message test has been sent
successfully
and
all
protocol
and
Figure 3 contains a block diagram illustrating the
telephone connections are released.
interconnectivity of the various functional blocks
comprising the CH2166 iModem products.
EXAMPLE 8C. In this case the user specifies the ISP
telephone number as part of @ETXCONN command
The iModem can perform the following Internet
and the destination email address is specified with the
connectivity operations:
@ETXFILE command. The email file is sent with a
1. Establish an IP/PPP/PSTN dialup connection with
sequence Standard Commands. All configuration
an ISP.
parameters except the ISP telephone number and
2. Authenticate with an ISP, and a POP3 or SMTP
destination email address are derived from the default
server.
iModem SMTP application profile.
3. Sends and Retrieve email in conjunction with
SMTP and POP3 servers
Enter:
@GIDGET: TX_MAIL<CR>
Result:
POSTED: Operation started. Indicates
IModem Internet operations are initiated and controlled
the CH2166 has received and begun
by a system level host processor. Refer to Table III for
executing the command.
a complete set of pin descriptions.
Result:
OK[1]: E-Mail transmission Session ID
Allocated.
The CH2166 indicates a
When Internet Appliance operation is not selected, the
Session Activity ID is allocated.
iModem functions as a standard analog modem.
Enter:
@ETXCONN[1]:
PHONE=9,123-
4567<CR>
µP Controller. The µP controller performs the required
®
Result:
POSTED[1]:
Operation
started.
internet operations by interpreting each specific @
Indicates the CH2166 has received and
command and executing the appropriate internet
begun executing the command.
commands. The necessary internet protocol firmware
is resident in flash RAM. The @ commands function
®
Result:
OK[1]: E-Mail connection established.
The
CH2166
indicates
that
IP
as an extension to the industry standard Hayes AT
connectivity is established. This includes
command set.
establishment of a PSTN telephone
connection.
Internal Modem.
The internal modem is used to
Enter:
@ETXFILE[1]: FILE=test
establish a data connection with the ISP. The CH2166
TO=staff@cermetek.com<CR>
contains a V.90 internal modem. The internal modem
Result:
POSTED[1]:
Operation
started.
can be controlled with Hayes AT commands and is
Indicates the CH2166 has received and
compatible with industry standard communication
begun executing the command.
software.
Refer
to
Cermetek
publication,
AT
Result:
OK[1]: File sent. The CH2166 indicates
Commands and S-Registers, for a more detailed
the file has been successfully sent and
discussion of the Hayes AT commands supported by
the SMTP server connection is released.
the iModem product family.
Enter:
@ETXDISC[1]:<CR>
Result:
POSTED[1]:
Operation
started.
When operating in standard analog modem mode, the
Indicates the CH2166 has received and
maximum Data Terminal Equipment (DTE)/Host system
begun executing the command.
communication speed is established by the maximum
Result:
OK[1]: E-Mail connection released.
speed available from the DTE/Host and is not limited by
The CH2166 indicates all protocol and
the iModem product.
telephone connections are released.
IMPORTANT NOTICE
AS
DELIVERED
FROM
THE
FACTORY,
all
DESCRIPTION OF FUNCTIONAL BLOCKS AND
command
communication
between
the
CH2166
DISCUSSION OF BASIC OPERATIONS
iModem and the host processor (DCE) is conducted
Each CH2166 iModem product consists of the following
over the serial interface at 19.2kbps (8-N-1).
functional blocks:
1. µP controller with Network Protocols and Flash
ROM.
2. Serial interface buffer.
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CH2166 High Speed Internet Modem Family
CH2166 DCE Speed. AS DELIVERED FROM THE
Adequate separation and restraint of cables and
FACTORY, the CH2166 iModem will only communicate
cords must be provided.
with the DCE at 19.2 kbps (8-N-1). However, the user
may modify the DCE speed with the appropriate AT
The circuitry from the iModem to the telephone
commands.
For a more detailed discussion of the
interface must be provided in wiring that carries no
commands, refer to Cermetek document, CH2166:
other circuitry other than that specifically allowed
Commands, Profiles and Examples.
in the FCC rules (such as A and A1 leads).
Serial Host Interface Buffer. The iModem utilizes a
2.
Connection to the PSTN line should be made
serial V.24 EIA 232-E 5V interface to communicate with
through an RJ-11C jack.
the internal modem and to communicate with the
internal µP. Signal levels are TTL rather than RS-232C
3.
PCB traces from the iModem’s RING and TIP pins
level compatible, which allows direct connection of the
to the RJ-11C jack must be 0.1 inch spacing or
HS Modem to the host’s UART without level translating
greater to one another and 0.2 inch spacing or
circuitry. The CH2166 is controlled by sending serial
greater to all other traces. The traces should have
commands over TXD and by monitoring serial status
a nominal width of 0.020 inches or greater.
messages returned on RXD.
4.
The RING and TIP PCB traces should be as short
Speaker Interface.
The SPK output reflects the
as possible and oriented to prevent coupling with
receiver analog input and provides a signal that can be
other high speed or high frequency signals present
used to monitor call progress. The SPK signal can
on the host circuit PCB.
drive a 300-ohm load directly. Typically, the SPK signal
is input into an audio power amplifier and the amplifier,
5.
No additional circuitry other than that shown in
in turn, drives the speaker coil. Figure 5 indicates one
Figure 3 may be connected between the iModem
method of driving an external 8-ohm speaker.
module and the RJ-11C jack.
Doing so will
invalidate the conveyed FCC approval.
Telephone Line Interface or DAA.
The iModem
family includes a unique low distortion DAA designed
6.
The iModem, the RJ-11C jack, the interfacing
for optimal performance over all PSTN line conditions
circuitry and all PCB traces must be contained on
thereby
achieving
the
most
reliable
and
best
a PCB with a 94 V-0 flammability rating.
performance PSTN connections.
7.
The supplied FCC registration label must be
The CH2166 iModem is designed to meet North
applied visibly on the outside of the product.
American telephone standards as set by FCC Part 68
(USA) and Industry Canada CS-03 Part I (Canada).
8.
The product’s User Manual must provide the user
Each iModem product is shipped from the factory with
with instructions for connection and use as
an FCC label indicating the FCC registration number
recommended in the FCC Registration Section
and ringer equivalent.
The PSTN line interface is
below.
UL1950 and CSA listed. Consequently, the iModem
family of products satisfies U.S. and Canadian
requirements, and will meet other international approval
CANADIAN APPROVALS
agency requirements that specify these levels of
The iModem family is approvable for use by DOT to
isolation.
CSA CS-03 Part I. However, per Canadian procedures,
approval can only be granted after the iModem has
Pins 1 and 2 function as both input and output
been installed into the end product.
Typically,
connections to the PSTN. To maximize field reliability
Canadian approval is obtained by submitting the final
in hostile environments, to ensure UL compliance, and
end product to an independent test house or consultant
also optionally for FCC part 15 compliance, these two
for evaluation. The test house/consultant then forwards
pins may be routed through an external network such
the test results and applicable documents to the
as that briefly described in figure 3 or as described in
regulatory agency. Cermetek offers a list of consultants
more detail in Cermetek Application Note # 126,
to assist with this process.
Supplemental PSTN Line Protection.
iMODEM HANDLING AND ASSEMBLY
PHONE LINE CONNECTION GUIDELINES
RECOMMENDATIONS
1.
The iModem must be mounted in the final
The iModem contains static-sensitive components and
assembly such that it is isolated from exposure to
should only be handled by personnel and in areas that
any hazardous voltages within the assembly.
are properly protected against static discharge.
2007 Cermetek Microelectronics, Inc.
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Document No. 607-0023 Revision A5 (05/07)
HIGH SPEED INTERNET MODEM FAMILY
CH2166
-
Send/Retrieve Email. Unlimited Email, V.90
There
are
two
mounting
techniques
that
are
1. Direct soldering.
recommended for physically connecting the iModem to
2. Sockets.
a PCB:
Figure 4.
HS Modem Family Application Diagram.
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Figure 5. Speaker Control Circuit.
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Table I. Summary of Available Commands By Category for CH2166.
Command
Command Description and Syntax
Quick Commands
@QST
Purpose: To store an E-Mail message.
Syntax:
@QST: VOLATILE FILE=<FILE_NAME> TO=<RECIPIENT>
FROM=<SOURCE> SUBJECT=<TITLE>
@QTM
Purpose: To send a stored E-Mail message.
Syntax:
@QTM: FILE=<FILE_NAME> INTERNAL PROFILE=<PROFILE_NAME>
TO=<RECIPIENT> FROM=<SOURCE> SUBJECT=<TITLE>
@QTX
Purpose: To send a streaming E-Mail message.
Syntax:
@QTX: PROFILE=<PROFILE_NAME> TO=<RECIPIENT>
FROM=<SOURCE> SUBJECT=<TITLE>
@QRX
Purpose: To retrieve an email message from a POP3 E-Mail server.
Syntax:
@QRX: MSG=<MSG_NO> PROFILE=<PROFILE_NAME>]
CH2166 Management Commands
@ETXC
Purpose: To modify SMTP AP Profiles and to set the SMTP configuration parameters. This
command may only be executed when no Session IDs have been allocated.
All
parameters are optional, only specified parameters will be changed all others will remain
unchanged.
Syntax:
@ETXC: PROFILE=<SMTP_PROFILE>
SERVER=<IPV4 or TEXT>-<SERVER ADDRESS>
FROM=<EMAIL SOURCE ADDRESS> TO=<EMAIL DESTINATION ADRESS>,
<ADDITIONAL EMAIL DESTINATION ADRESS(ES)>
AUTH_METHOD=<AUTHENTICATION METHOD>
ID=<USER ID> PW=<USER PASSWORD>
@ERXC
Purpose: To modify POP3 AP Profiles and to set the POP3 configuration parameters. This
command may only be executed when no Session IDs have been allocated.
All
parameters are optional, only specified parameters will be changed all others will remain
unchanged.
Syntax:
@ERXC: PROFILE=<POP3_PROFILE>
SERVER=<IPV4 or TEXT>-<SERVER ADDRESS>
ID=<USER ID> PWD=<USER PASSWORD>
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CH2166 High Speed Internet Modem Family
Table I. Summary of Available Commands By Category for CH2166 (continued).
Command
Command Description and Syntax
@LINKC
Purpose: To modify Link Profiles.
Syntax:
@LINKC: LEVEL=<PROFILE TYPE> PROFILE=<PROFILE NAME>
PHONE=<LOCAL ACCESS POP NUMBER>
RAW=<RAW LOGIN ID> RAW_PWD=<RAW LOGIN PASSSWORD>
PPP_AUTH_METHOD=<PPP AUTHENTICATION PROTOCOL>
PPP_ID=<PPP ID> PPP_SECRET=<PPP PASSWORD or CHAP SECRET>
File Management Commands
@ESCLOSE
Purpose: To close a local file.
Syntax:
@ESCLOSE[ID]: FILE=<FNAME>
@ESDELETE
Purpose: To delete local files.
Syntax:
@ESDELETE[ID]: FILE=<FNAME> TYPE=<FTYPE>
@ESLIST
Purpose: List all local files by name and identify whether volatile or static (i.e., non-volatile).
Syntax:
@ESLIST[ID]: TYPE=<FTYPE> FORMAT=<DTYPE> FILE=<FNAME>
@ESOPEN
Purpose: To open a local file for either reading and/or writing.
Syntax:
@ESOPEN[ID]: FILE=<FNAME> <VOLATILE> MAX=<DMAX> <CREATE>
FROM=<FDATA> TO=<TDATA> SUBJECT=<SDATA>
@ESRDATA
Purpose: To read data from an opened file.
Syntax:
@ESRDATA[ID]
@ESWDATA
Purpose: To write to an opened file.
Syntax:
@ESWDATA[ID]: <DATA>
Socket Commands
@ISOCKET
Purpose: To allocate a socket.
This usage is consistent with the Berkley Sockets Library
definitions.
Syntax:
@ISOCKET[ID]: RXMAX=<RX_MS> TXMAX=<TX_MS>
@ISTXD
Purpose: To send data over a TCP connection.
Syntax:
@ISTXD[ID]<DLEN> :<DATA>
@ISIPADD
Purpose: To get the IP address of a host system using DNS.
Syntax:
@ISIPADD[ID] NAME=<SYMBOLIC SERVER NAME>:
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CH2166 High Speed Internet Modem Family
Table I. Summary of Available Commands By Category for CH2166 (continued).
Command
Command Description and Syntax
@ISCLOSE
Purpose: To release a TCP and/or socket connection.
Syntax:
@ISCLOSE[ID]: HOST=<NAME>
@ISRXD
Purpose: To receive data over a TCP connection.
Syntax:
@ISRXD[ID]: MAX=<DLEN>
@ISHOSTIP
Purpose: To get the TCP port and IP Address of the local iModem system.
Syntax:
@ISHOSTIP[ID]
@ISHOST
Purpose: To get local iModem system name.
Syntax:
@ISHOST[ID]
@ISCONN
Purpose: To establish a TCP connection.
Syntax: @ISCONN[ID]: PROFILE=<PNAME> PORT=<DEST_PORT>
SERVER=<IPV4 or TEXT>-<SERVER ADDRESS>
@ISABORT
Purpose: To force the release of a TCP connection and any underlying dialup IP link.
Syntax:
@ISABORT[ID]
@ISIPCONN
Purpose: To establish a dialup IP link.
Syntax:
@ISIPCONN[ID]: PROFILE=<PNAME>
PHONE=<TNO> RAWLOG=<RDATA> LINKLOG=<LDATA>
@ISIPREL
Purpose: To release an IP link.
Syntax:
@ISIPREL[ID]
@ISBIND
Purpose: To bind local address to a socket.
Syntax:
@ISBIND[ID]: PORT=<SOURCE_PORT> ADD=<SOURCE_IP>
CH2166 Management Commands
@VMAGENT
Purpose: To set the unit ID string. This command may only be executed when no Session IDs
have been allocated.
Syntax:
@VMAGENT: SET=<UNIT_ID_STRING>
@VMAGENT
Purpose: To display the unit ID string. This command may only be executed when no Session IDs
have been allocated.
Syntax:
@VMAGENT: GET
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CH2166 High Speed Internet Modem Family
Table I. Summary of Available Commands By Category for CH2166 (continued).
Command
Command Description and Syntax
Session Management Commands
@GIDGET
Purpose: To allocate Session IDs for application session activities and instances.
Syntax:
@GIDGET: <APPLICATION_ID>
@GIDFREE
Purpose: To release a Session ID.
Syntax:
@GIDFREE[ID]
EMAIL Transmission Commands
@ETXFILE
Purpose: To send a stored E-Mail file as an email message.
Syntax:
@ETXFILE[ID]: FILE=<FNAME> <INTERNAL> PROFILE=<PNAME>
SUBJECT=<SDATA> FROM=<SOURCE> TO=<T0LIST>
@ETXDSTART Purpose: To begin streaming E-Mail transmission.
Syntax:
@ETXDSTART[ID]: PROFILE=<PNAME> SUBJECT=<SDATA> FROM=<SOURCE>
TO=<T0LIST>
@ETXDEND
Purpose: To end streaming E-Mail transmission.
Syntax:
@ETXDEND[ID]
@ETXDATA
Purpose: To send streaming E-Mail data.
Syntax:
@ETXDATA[ID]: User supplied ASCII data
@ETXCONN
Purpose: To establish an IP Link connection for E-Mail transmission.
Syntax:
@ETXCONN[ID]:
PROFILE=<PNAME>
SERVER=<IADD>
PORT=<SPORT>
AUTH_METHOD=<SAUTH>
SERVLOG=<SDATA>
DIALUP=<TRUE/FALSE>
PHONE=<TNO> RAWLOG=<RDATA> LINKLOG=<LDATA>
@ETXQCONN
Purpose: To establish an E-Mail server connection with preconfigured address data.
Syntax:
@ETXQCONN[ID]: PROFILE=<PNAME>
@ETXDISC
Purpose: To Release an E-Mail IP Link.
Syntax:
@ETXDISC[ID]
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CH2166 High Speed Internet Modem Family
Table I. Summary of Available Commands By Category for CH2166 (continued).
Command
Command Description and Syntax
POP3 and Email Retrieval Commands
@ERXQUERY
Purpose: Query POP3 server about message attributes.
Syntax: @ERXQUERY[ID]: LIST=<MLIST>FORMAT=<FTYPE>
@ERXLIST
Purpose: List E-Mail messages on POP3 server.
Syntax: @ERXLIST[ID]: FORMAT=<FTYPE>
@ERXDATA
Purpose: To retrieve an E-Mail message data.
Syntax: @ERXDATA[ID]
@ERXMAIL
Purpose: Retrieval an E-Mail message by message number.
Syntax: @ERXMAIL[ID]: MSG=<MSG_NO> MAX=<NBYTES>
@ERXDELETE Purpose: Delete an E-Mail message.
Syntax: @ERXDELETE[ID]: LIST=<MLIST>
@ERXCONN
Purpose: To establish an E-Mail POP3 server connection.
Syntax: @ERXCONN[ID]: PROFILE=<PNAME> SERVER=<IADD> PORT=<SPORT>
SERVLOG=<SDATA> DIALUP=<TRUE/FALSE> PHONE=<TNO>
RAWLOG=<RDATA> LINKLOG=<LDATA>
@ERXQCONN
Purpose: To establish an E-Mail POP3 server connection with preconfigured address data.
Syntax: @ERXQCONN[ID]: PROFILE=<PNAME>
@ERXDISC
Purpose: To release an E-Mail POP3 server connection.
Syntax: @ERXDISC[ID]
iModem/Modem Mode Commands
@IMENTER
Purpose: To Enter iModem/Modem mode. No session ID required
Syntax:
@IMENTER
@IMEXIT
Purpose: To Exit iModem/Modem mode. CH2166 MUST be in Command Mode to execute this
command.
Syntax:
@IMEXIT
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CH2166 High Speed Internet Modem Family
Table II. Summary of Available Application and Link Profiles.
Profile Name
Description and Comments
smtp.imodem.default
Purpose: Default Application Profile for Cermetek ISP SMTP server.
pop3.imodem.default
Purpose: Default Application Profile for Cermetek ISP POP3 server.
link.imodem.default
Purpose: Default Link Profile for Cermetek Dial-up POP connection.
smtp.att
Purpose: Generic Application Profile for AT&T ISP SMTP server.
pop3.att
Purpose: Generic Application Profile for AT&T ISP POP3 server.
link.att
Purpose: Generic Link Profile for AT&T Dial-up POP connection.
smtp.sbc
Purpose: Generic Application Profile for SBC ISP SMTP server.
pop3.sbc
Purpose: Generic Application Profile for SBC ISP POP3 server.
link.sbc
Purpose: Generic Link Profile for SBC Dial-up POP connection.
smtp.lmi
Purpose: Generic Application Profile for LMI ISP SMTP server.
pop3.lmi
Purpose: Generic Application Profile for LMI ISP POP3 server.
link.lmi
Purpose: Generic Link Profile for LMI Dial-up POP connection.
smtp.earthlink
Purpose: Generic Application Profile for Earthlink ISP SMTP server.
pop3.earthlink
Purpose: Generic Application Profile for Earthlink ISP POP3 server.
link.earthlink
Purpose: Generic Link Profile for Earthlink Dial-up POP connection.
smtp.uunet
Purpose: Generic Application Profile for UUNET ISP SMTP server.
pop3.uunet
Purpose: Generic Application Profile for UUNET ISP POP3 server.
link.uunet
Purpose: Generic Link Profile for UUNET Dial-up POP connection.
iModem family.
If repairs are necessary after
Direct Soldering.
The iModem may be wave
installation of the iModem and the end product has
soldered onto a circuit card. All iModem products are
been delivered to the end user, the end product must
sealed and will not be harmed by industry standard
be returned to the end product supplier where the
wave soldering processes.
iModem can be removed and then forwarded to
Cermetek for repair.
The following notice is
Socketing.
The socket approach to mounting
recommended and should be included in the end
eliminates cleaning and desoldering concerns. When
product’s user manual.
the socket is used, it must make a solid connection to
all pins.
Failure to do so will cause unreliable or
intermittent operation. Also, steps should be taken to
FOR YOUR USER’S MANUAL
assure that the module remains tightly seated in the
The Part 68 rules require the following (or equivalent)
socket after the end product is shipped. Cermetek
be provided to the end user of the equipment
recommends the 50 pin strip socket CES-150-01-T-S
containing an iModem device.
by Samtec. Refer to Application Note# 130, Summary
of Recommend Supplies, for a list of supplies and
Type of Service: The (insert end product name) is
associated contact information.
designed to be used on standard device telephone
lines. It connects to the telephone line by means of a
standard jack called the USOC RJ-11C (or USOC
FCC REGISTRATION
RJ45S). Connection to telephone-company-provided
All CH2166 iModem products are registered with the
coin service (central office implemented systems) is
FCC under Part 68. To maintain the validity of the
prohibited. Connection to party lines service is subject
registration, notice of the restrictions the FCC places
to state tariffs.
on the iModem and its use must be served to the end
user of the product containing the iModem.
Changes in Attestation Procedure for Plugs and
Jacks: (Name of applicant) attests that the network
In addition to restriction notification, the FCC requires
interface plugs or jacks used on this equipment comply
that Cermetek make all repairs to all products in the
with and will continue to comply with the mechanical
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
requirements specified in Part 68, Sub-part F,
Serial port data rate auto baud enabled
specifically the dimensions, tolerances and metallic
Bell 212A operation at 1200bps
plating requirements.
The compliance of these
Parity – none
connectors will be assured by purchase specifications
Auto answer disabled
and incoming inspection.
Documentation of such
Command echo ON
specifications and/or inspections will be provided by
All result codes enabled – except \REL codes
the FCC within 30 days of their request for the same.
Wait for dial tone before dialing – 2 seconds
Dials with touch-tone (T)
Telephone Company Procedure: The goal of the
Detects busy signal (ATX4)
telephone company is to provide the best service it
Full word result codes – non-extended
can.
In order to do this, it may occasionally be
Pulse dial make/break ratio = 39/61-10pps
necessary for the telephone company to make
Test timer set to 0 seconds, test modes disabled
changes to their equipment, operations or procedures.
Inactivity timer set to 0 minutes
If these changes might affect service provided to the
CTS always active
users or the operation of the user’s equipment, the
DSR is ignored
telephone company will give the user notice, in writing,
DCD is ignored
to allow the users to make any changes necessary to
RTS to CTS delay - .01 seconds
maintain uninterrupted service.
DTR always active – hang up after transition
In certain circumstances, it may be necessary for the
Long space disconnect disabled
telephone company to request information from the
Speaker enabled but off when receiving carrier
users concerning the equipment which the user has
Speaker volume set to low
connected to the telephone line. Upon request of the
Local modem will not grant RDL request from remote
telephone company, provide the FCC registration
modem
number and the ringer equivalence number (REN);
Guard tones disabled
both of these items are listed on the equipment label.
Minimum DTR pulse width = .05 seconds
The sum of all of the REN’s on the user’s telephone
Ring count – 00
lines should be less than five in order to assure proper
Escape code character = 43 (+)
service from the telephone company. In some cases,
Flash to on hook = 70 msec
a sum of five may not be useable on a given line.
Auto speed detection enabled
Consult your telephone provider.
DTE connect speed, connect messages
Back space character = 08 (BS) Carriage return
If Problems Arise: If any of the user’s telephone
character = 13 (CR)
equipment is not operating properly, the user should
Line feed Character = 10 (LF)
immediately remove it from the user telephone line, as
Duration of wait for dial tone =2 seconds
it may cause harm to the telephone network. If the
Duration of wait for carrier after dialing = 50 seconds
telephone company notes a problem, they may
Carrier detect response time = 0.6 seconds
temporarily discontinue service. When practical, they
Escape code guard time = 1 second
will notify the user in advance of this disconnection. If
Length of use after comma = 2.0 seconds
advance notice is not feasible, the user will be notified
Last carrier to hang up delay = 1.4 seconds
as soon as possible.
DTMF interdigit delay = .095 seconds
Auto sync address or address detection =0
When the user is notified, the user will be given the
Connection detected at DTE – Highest speed
opportunity to correct the problem and informed of
38,400kbps
their right to file a complaint with the FCC. Contact the
Auto retrain enabled – 30 seconds attempts
local telephone service provider if any questions arise
MNP error correction mode can be negotiated (&Q5)
concerning the telephone service.
MNP – non-extended service selected
In the event repairs are ever needed on the (insert
MNP error correction block size is 128 characters
your product name), they should be performed by
selected
(insert your company name), or an authorized
Data compression – negotiation enabled
representative or (insert your company name). For
Transmit break length is 0.3 seconds
information contact: (insert your company address).
All breaks are transmitted in sequence with data
Serial port flow control enabled = RTS/CTS
XON/XOFF flow control characters selected
DEFAULT STATUS, PERFORMANCE AND
SPECSIFICATIONS
Prior to delivery, Cermetek installs into each CH2166
iModem the following default Configuration Profile:
Default Connect Speeds (DCE) is 19,200bps (8-N-1)
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Table III. CH2166 iModem Family Pin Description.
PIN
NAME
I/O
FUNCTION
Directly connects to the telephone line’s Ring lead through a user supplied RJ-11C jack.
1
RING
I/O
Directly connects to the telephone line’s TIP lead through a user supplied RJ-11C jack.
2
TIP
I/O
NO CONNECTION.
3
NC
---
NO CONNECTION.
4
NC
---
SPEAKER. Audio output for speaker. See speaker control diagram.
5
SPK
O
NO CONNECTION.
6
NC
---
NO CONNECTION.
7
NC
---
NO CONNECTION.
8
NC
---
NO CONNECTION.
9
NC
---
TRANSMIT DATA. Serial transmit data input. Marking, or a binary 1 condition is indicated
10
TXD
I
by a HIGH.
RECEIVE DATA. Serial Receive data output. Received marking or a binary 1 condition is
11
RXD
O
indicated by a HIGH.
NO CONNECTION
12
NC
---
DATA TERMINAL READY INPUT. Active LOW. Switching off DTR can either return
13
DTR
I
modem to command state, disconnect phone call, or reset modem. DTR should be set
LOW when not in use.
DATA SET READY. LOW indicates handshaking with a remote modem in progress,
14
DSR
O
and/or the data carrier of a remote modem has been detected.
RING INDICATION. This signal follows the frequency of the ringing signal and is normally
15
RI
O
about 20 to 40 Hz for 2 seconds on with 4 second off.
CLEAR-TO-SEND. Output always LOW. Reserved for flow controls with FAX option. Not
16
CTS
O
active, let float.
DATA CARRIER DETECT. LOW indicates a data carrier from a remote modem has been
17
DCD
O
detected. Must enable with AT&C1 Hayes command.
NO CONNECTION
18
NC
---
DC SUPPLY. 5V ± 5% required.
19
VCC
---
GROUND. Note: Noise should be less than 25mV peak to peak.
20
GND
---
RESET. Active HIGH. This input must be asserted HIGH for at least 10ms to reset the
21
RST
I
modem. RESET is then returned to LOW for normal operation. If no system reset is
available, let this pin float to enable internal reset.
REQUEST TO SEND. Active Low. Used for flow control. Should be tied Low when using
22
RTS
I
SEND pin and when using @T commands for CH2160 only.
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CH2166 High Speed Internet Modem Family
Figure 6. PSTN Line Interface for all iNet Appliance Products.
1. Currently Limiting PSTN Protection Line
2. Over Voltage and Lightning Protection.
Device.
A. Surge Protection is provided by internal
Current limiting devices are mandatory to meet
circuitry (see Figure 3). No additional external
UL safety standards. To maintain conveyed FCC
components
are
required
to
maintain
Part 68 approval, the current limiting components
conveyed FCC Part 68 approval.
identified as F1 and F2 in dashed Box #1 must
also survive FCC Part 68 surge testing. Refer to
B. In most environments, 2 terminal surge
Cermetek Application Note #126, Supplemental
suppressors are adequate.
For severe
PSTN Line Protection, for more details. Refer to
environments, use an external 3 terminal
Application Note # 130, Summary of Recommend
device with an earth ground.
Suppliers, for a list of suppliers and associated
part numbers.
3. EMI/RFI Suppression.
A. A PTC (rated at 0.15 amps) is preferred
No external EMI/RFI noise suppression circuitry is
because it resets automatically upon removal
required to maintain conveyed FCC Part 68
of the current flow. Fuse devices are also
approval.
However, additional suppression, if
acceptable. Refer to Application Note #130
required for other reasons, may be added as
for a complete list of recommended vendors
described below in Sections 3A-3B without
and associated part numbers.
adversely affecting FCC Part 68 approval.
B. Resistors (10 Ω carbon film or 1/8 watt
A. To provide adequate EMI/RFI suppression,
minimum) may be used in Canada, as
the capacitor/inductor network contained in
Canada has no requirements that PSTN
dashed Box #3 should be located as close to
equipment be operational after a Type B
the RJ-11C jack as possible.
Further, this
surge test.
network should be provided with an excellent
C. Although Industry Canada CS-03 Part 1
ground path to the chassis.
(Canada) follows the requirements of FCC
B. Capacitors C1 and C2 should not exceed
Part
68
(USA),
Cermetek
recommends
0.005 µ f. They must have a rating of 1.5KV
contacting DOT (Canada) and/or a certified
and typically are 0.001 µ f ± 20%. Inductors L1
independent lab to verify compliance.
For
and L2 may be either individual inductors or a
Canada, use either 10 Ω resistors (carbon film
dual inductor. Refer to Application Note #130
or SMD parts 1/8 watt minimum) as described
for a complete list of recommended vendors
in paragraph B above.
and associated part numbers.
For UL
applications, choose capacitors and inductors
that are UL 1950 listed. The actual values of
the components used may vary depending on
the end product design.
2007 Cermetek Microelectronics, Inc.
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CH2166 High Speed Internet Modem Family
Table IV. Analog Characteristics.
NAME
TYPE
CHARACTERISTICS
VALUE
SPK
O(DF)
Minimum Load
300ohm
Maximum Capacitive Load
0.01µf
Output Impedance
10ohm
Output Voltage
2.5 ± 1.6V
D.C. Offset
<20mV
Table V. Summary CH2166 iModem Family of Products.
Model
Summary of Features
Operating Temperature
CH2166
Send and Retrieve Streaming Email. Email Send Control Pin
0°C to 70°C
Full Function, V.90, 56Kbps, FCC Part 68 Approved, UL 1950 listed.
Table VI. CH2166 iModem Electrical Specifications.
Symbol
Characteristic
Min.
Typ.
Max.
Units
V CC
Positive Supply Voltage
4.5
5.0
5.5
V
I CC Off Hook
Nominal Operating Current @
300.0
mA
V CC = 5.5V when modem is Off Hook
V IH
High Level Input Voltage @ 5.0V
2.0
3.5
V
V IL
Low Level Input Voltage @ 5.0V
1.0
2.2
V
V IH
High Level Input Voltage (Excluding IN1, IN2,
2.0
3.5
V
SEND) @ 5.0V
V IL
Low Level Input Voltage (Excluding IN1, IN2,
0.8
V
SEND) @ 5.0V
VT+
Positive Hysteresis Threshold for RESET Pin
2.9
V
VT-
Negative Hysteresis Threshold for RESET Pin
1.98
V
V OH
High Level Output (Including SENT) with I OH =
2.4
V
0.5mA
V OL
Low Level Output (Including SENT) with I Ol =
0.6
V
1.6mA
I IN
Input Leakage Current (TXD, DTR, RTS)
100
uA
I IL
Input Current (RST, IN1, IN2, SEND)
1.0
uA
C P
Capacitive Load (TXD, DTR, RTS)
10
pF
Capacitive Load (RTS)
8
pF
2007 Cermetek Microelectronics, Inc.
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Document No. 607-0023 Revision A5 (05/07)
Cermetek Microelectronics, Inc.
CH2166 High Speed Internet Modem Family
Table VII. CH2166 iModem Electrical Specifications.
Parameter
Minimum
Typical
Maximum
Units
Comments
Off Hook Impedance
20
Mohm
Trans Hybrid Loss
25
dB
600 Ohm, RXA, TXA
Ring Voltage Loop
15
V PP
On 48VDC line voltage
for sustained periods
Line Loop Current - (Off
20
60
mA
Hook)
Return Loss @ 1000 Hz
15
dB
600 Ohm
Ring Frequencies
20
40
60
Hz
Receiver Insertion Gain
-0.5
0.0
+0.5
dB
Transmit Power
-9.5
dBm
600 Ohm- Data Mode
First Character After Reset
25.0
sec
Delay
See Note 1
Inter Character Delay
20
50
msec
Between all command
characters
Command Delay
100
200
msec
Between all AT
commands
Minimum Reset Pulse
1
µsec
If user supplied
Note: 1. All CH2166 iModem devices re-load operating firmware upon reset and then perform an internal
self-check. The CH2166 will not respond to commands issued during this sequence.
Figure 7.
Physical Dimensions and Pin Functions for CH2166 Product Family.
2007 Cermetek Microelectronics, Inc.
Page 27
Document No. 607-0023 Revision A5 (05/07)
Cermetek Microelectronics, Inc.
CH2166 High Speed Internet Modem Family
Cermetek reserves the right to make changes in specifications at any time and without notice. The information furnished by
Cermetek in this publication is believed to be accurate and reliable. However, Cermetek assumes no responsibility for its use, or for
any infringements of patents or other rights of third parties resulting from its use. No license is granted under any patents or patent
rights of Cermetek.
Cermetek provides the user with a FCC (USA) and IC (Canada) Approved or Approvable device. However, Cermetek does not
have influence over nor knowledge of the specific user application environment. Therefore, for FCC and IC Approved or Approvable
devices, the user assumes all risk for maintaining compliance to registration.
Printed in U.S.A
1390 BORREGAS AVENUE | SUNNYVALE CA 94089 | LOCAL: 408-752-5000 | TOLL FREE: 1-800-882-6271 | FAX: 408-752-5004
CERMETEK WEB SITE: http://www.cermetek.com | EMAIL: sales@cermetek.com
2007 Cermetek Microelectronics, Inc.
Page 28
Document No. 607-0023 Revision A5 (05/07)