r6781-12 Conexant Systems, Inc., r6781-12 Datasheet - Page 65

• Manufacturer Part Number: r6781-12
• Description: Embedded Modem Family
• Manufacturer: Conexant Systems, Inc.

6.1.1 Data Mode Selection
6.1.2 Data Modem Processing
D224ATLVDSC
6.0 Operation
Modem operation supports data modem processing, fax modem processing and
common call progress processing.
operation.
6.1 Data Modes
Data mode operation is defined by the AT commands and S register settings
described in Chapter 4 and Chapter 5. Data rate selection is determined by the
speed of the originating and answering modems as listed in
Table 6-1. Data Rate Selection
Data modem processing is explicitly defined in CCITT V .22 bis, CCITT V .22,
Bell 212A, and Bell 103 documentation. All modulation, waveform spectrum,
and data processing functions conform to the appropriate specifications with the
following exceptions:
Answer Mode
The AT+FCLASS command allows the operator to select either data or fax
AT+FCLASS=0 Data mode
AT+FCLASS=1 Fax mode Class 1
1.
2.
3.
4.
1200
2400
300
CTS is ON all the time and does not go OFF during handshake.
DSR is always ON in parallel mode operation.
The rate change request option is not supported for V .22 bis.
V .22 operation supports only Alternative B, mode ii (1200 bps
asynchronous, 10 bit characters)
Conexant
300
300
300
300
6
Originate Mode
1200
1200
1200
1200
2400
1200
1200
2400
Table
6-1.
6-1