DS28-L147-043 Ver la hoja de datos (PDF) - Conexant Systems

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DS28-L147-043

SMXXD Modem

Conexant Systems 

1.4.3.2

1.4.3.3

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CX06833-3x/4x SMXXD Modem Data Sheet

command interface. Full HDLC formatting, zero insertion/deletion, and CRC

generation/checking are provided.

V.44 Data Compression

V.44 provides efficient data compression that minimizes the download time for the types

of files associated with Internet use. This improvement is most noticeable when browsing

and searching the web since HTML text files are highly compressible. (The improved

performance amount varies both with the actual format and with the content of individual

pages and files.)

Country Support

Country-specific 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.

Country code IDs are defined by ITU-T T.35.

Embedded ROM code includes default profiles for 29 countries. Additional country

profiles can be stored in internal SRAM or external serial EEPROM (request additional

country profiles from a Conexant Sales Office). Duplicate country profiles stored in

internal SRAM or external serial EEPROM will override the profiles in embedded ROM

code. The default countries supported are listed Table 1-2. Country profiles for CTR-21

countries are TBR-21 compliant.

TAM Mode

TAM Mode features include 8-bit linear coding at 8 kHz sample rate. Tone detection/

generation, call discrimination, and concurrent DTMF detection are also supported.

TAM Mode is supported by four submodes:

• Online Voice Command Mode supports connection to the telephone line or, for S

models, a microphone/speaker/handset/headset.

• Voice Receive Mode supports recording voice or audio data input from the

telephone line or, for S models, a microphone/handset/headset.

• Voice Transmit Mode supports playback of voice or audio data to the telephone line

or, for S models, a speaker/handset/headset.

• Full-duplex Receive and Transmit Mode.

102228A

Conexant

1-7

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