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APPLICATION NOTES

The links from the lists below are to PDF downloadable versions of the Cermetek and Xecom Application Notes.

You can also find Cermetek and Xecom Datasheets in PDF format.

 

General Modem References:
  "AT" Commands & S-Registers
001 "AT" Commands & S-Registers
002 CH32GGT AT Command Reference Manual
004 IModem Command Reference Manual
110 Manual Originate and/or Answer Operation of Cermetek Modem Module
115 Conveyed FCC Part 68 Approval
116 Operation of Cermetek Leased Line Modem Module
120 Overview of Basic Problems Encountered with PSTN Lines That Can Adversely Affect DAA and Modem Operations
125 Part 68 Plug/Jack Attestation List
126 Supplemental PSTN Line Protecting
127 Telecommunication Compliance Consultants
128 Serial Port Overruns
130 Summary of Recommended Suppliers
148 Procedure to Convert Between Decimal, Hexadecimal and ASCII Formats
160 Using PROCOMM with CH2124/60
171 Decreasing CH1794 Handshake Time
174 Caller ID Feature for CH1786A, CH1794A and CH2056A Modems
175 Surge Protection Guidelines and Recommendations
177 Off-Hook Detection Using AT Commands
179

Using MS Windows Hyper Terminal with Modem Products
Detailed step-by-step procedures to set-up and control iModem functions using MS Windows HyperTerminal accessory program; numerous examples provided to query and verify successful data transmission.

200

Design Tips on Suppression of EMI/RFI

 

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Internet Modem References:
150
General Operation of Cermetek iModem Products.
Hardware overview of iModem operation, includes functional block diagrams, brief description of software configuration and operation in typical evaluation platform
155
@T® Command Set Description and Usage for CH2124/60 iModem Products.
Detailed description of special Internet Modem queries and set-up commands; command structure table and step-by-step tutorial examples.
156
CH2124/60 iModem Default Configuration Profile.
Detailed description and structure of default ISP configuration profile.
157
Using MS Windows Hyper Terminal with iModem Products.
Detailed step-by-step procedures to set-up and control iModem functions using MS Windows HyperTerminal accessory program; numerous examples provided to query and verify successful data transmission.
Cermetek iModem Caveats and Definitions.
Suggestions that help avoid common problems relating to hardware or command set-up problems.
159
Using iNetWizard® with CH2124/60.
Complete technical manual, which documents use of convenient special iNetWizard set-up disk, which is provided for easy set-up, profile configuration, and verification of the iModem.
163
Recommendations for Improved iModem Internet Connectivity.
Quick method to improve message transfer reliability through reduction in iModem transmission speed for installations that may be connected to a noisy PSTN dial-out line.
325
@T Command Set Description and Usage for CH2165 iModem.
Detailed description of special Internet Modem queries and set-up commands; command structure table and step-by-step tutorial examples.
327
CH2165 iModem Default Configuration Profile.
Basic description and detailed instructions on the creation and transmission of Email messages.
401
Send Mail API for CH216x iModem Products.
Detailed description and structure of default ISP configuration profile.

 

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Modem/DAA Usage:
113 Solutions to Dialing Pagers Using Modems
114 Simulating an Active/Wet PSTN 2-Wire Line and Connecting Two Modems
129 911 Emergency Interrupt Circuit for CH1786 Modem Modules
133 Using the CH1786 DAA to Perform DTMF Functions Via An External DTMF Transceiver
137 Implementing a DTMF Modem Front End Using Cermetek DAA's
138 Limiting Current on PSTN Lines
146 CH2056 V.80 Support Details Using V.80 for Synchronous Data Communication with the RC56D Modem
147 Description of New AT +MS Command Implementation for CH179X and CH2056 Products
165 CH1798 and CH1799 Products: Known Incompatibilities Between pre-1 August 2000 and post -1 August 2000 Products
170 2-4 Wire Converter for Use with CH179x and CH2056 Modems
178 Improved Modem Cellular Operations

 

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Reference Notes:
104 United States PSTN Central Office Nominal Parameter Values
105 Comparative Features and Benefits Review: Internet Modems versus Standard Analog Modems.

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