CX81801-7X 查看數據表（PDF） - Conexant Systems

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产品描述 (功能)

生产厂家

CX81801-7X

SmartV.XX Modem

Conexant Systems 

2.7.3

2.8

2.9

2.10

2.10.1

2.10.2

2-8

CX81801-7x/8x SmartV.XX Modem Data Sheet

Remote Hangup Detection

The Remote Hangup Detection feature will cause the modem to go back on-hook and

respond with the message “LINE REVERSAL DETECTED” during a data connection

when the remote modem is disconnected for abnormal termination reasons (remote phone

line unplugged, remote server/modem shutdown). For Voice applications, this method

can be used in addition to silence detection to determine when a remote caller has hung

up to terminate a voice recording.

Fax Class 1 and Fax Class 1.0 Operation

Facsimile functions operate in response to fax class 1 commands when +FCLASS=1 or to

fax class 1.0 commands when +FCLASS=1.0.

In the fax mode, the on-line behavior of the modem is different from the data (non-fax)

mode. After dialing, modem operation is controlled by fax commands. Some AT

commands are still valid but may operate differently than in data modem mode.

Calling tone is generated in accordance with T.30.

Point-of-Sales Support

Point-of-Sales (POS) terminals usually need to exchange a small amount of data in the

shortest amount of time. Low speed modulations such as Bell212A or V.22 are still

mainly used in POS applications. Additionally, new non-standard sequences have been

developed to better support POS applications.

Industry standard and shortened answer tone B103 and V.21 are supported, as well as

FastPOS (V.29) and V.22 Fast Connect. POS terminal modulations are supported by the

$F command.

Voice/Audio Mode

Voice and audio functions are supported by the Voice Mode. Voice Mode includes four

submodes: Online Voice Command Mode, Voice Receive Mode, Voice Transmit Mode

and Full-Duplex Receive and Transmit Mode.

Online Voice Command Mode

This mode results from the connection to the telephone line or a voice/audio I/O device

(e.g., microphone, speaker, or handset) through the use of the +FCLASS=8 and +VLS

commands. After mode entry, AT commands can be entered without aborting the

connection.

Voice Receive Mode

This mode is entered when the +VRX command is active in order to record voice or

audio data input at the RIN pin, typically from a microphone/handset or the telephone

line.

Received analog voice samples are converted to digital form and compressed for reading

by the host. AT commands control the codec bits-per-sample rate.

Conexant

102199B

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