ds22-l100-041 Conexant Systems, Inc., ds22-l100-041 Datasheet - Page 11

• Manufacturer Part Number: ds22-l100-041
• Description: Cx84100-41/-23 Scxv.22bis Modem V.22bis Modem With Cx20493 Smartdaa? Line Side Device
• Manufacturer: Conexant Systems, Inc.

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102339C
Technical Overview
General Description
MCU
Operating Modes
Modem operation, including dialing, call progress, telephone line interface, telephone
handset interface, and host interface functions are supported and controlled through the
AT command set.
The modem hardware connects to the host via a serial interface. The OEM adds a crystal
circuit or clock input, DIB components, telephone line interface, and other supporting
discrete components as required by the application to complete the system.
The MCU performs processing of general modem control, command sets, data modem,
error correction, worldwide, V.80, serial host interface functions, and signal processing.
Data Modes
The modem operates in 2-wire full-duplex, asynchronous and synchronous modes at line
rates up to 2400 bps (V.22bis), 1200 bps (V.22, V.22 fast connect, and Bell 212A), and
300 bps (V.21 and Bell 103). V.23 full duplex (asymmetrical connect rate of 1200 bps in
one direction and 75 bps in the other direction) and V.23 half duplex mode (1200 bps) are
also supported.
In V.22 fast connect data mode, the modem can connect at 1200 bps with a very short
training time, which is very efficient for small data transfers.
Worldwide Operation
The modem operates in TBR21-compliant and other countries. Country-dependent
modem parameters for functions such as dialing, carrier transmit level, calling tone, call
progress tone detection, answer tone detection, blacklisting, Caller ID, and relay control
are programmable.
SmartDAA technology allows a single PCB design and single BOM to be homologated
worldwide. Advanced features such as extension pickup detection, remote hang-up
detection, line-in-use detection, and digital line detection are supported.
Internal ROM includes default profiles for 64 countries. Additional country profiles can
be uploaded to internal RAM (request additional country profiles from a Conexant Sales
Office). Duplicate country profiles uploaded to internal RAM will override the default
profiles in internal firmware. Country code IDs are defined by ITU-TT.35. The default
countries supported are listed in Table 1-2.
CX84100-41/-23 SCXV.22bis Modem Data Sheet
Conexant
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