56K V.92 Data, Fax, and Voice Chipset

Table 5-3. Fax Mode Command Descriptions (Continued)

Note: An asterisk (*) denotes the factory-default setting.

Command

Default

Description

 

 

 

 

 

Transmit Data: The +FTM = <mod> command causes the modem to transmit

 

 

data using the modulation selected in <mod>.

 

 

The modem returns a “CONNECT” result code and transmits the proper training

 

 

sequence in the selected mode, followed by constant “1” bits until data is received

 

 

from the DTE. The modem terminates this command upon detecting <DLE><ETX>

 

 

characters in the data stream.

 

 

If the modem’s transmit buffer empties and the last transmitted character is an

 

 

ASCII NULL (00), the modem continues to transmit NULLs until the DTE sends

 

 

more data or 5 seconds have elapsed. After 5 seconds have elapsed with an emp-

 

 

ty transmit buffer, the DCE turns off the transmit carrier, returns to command state,

+FTM=n

none

and returns an “ERROR” result code to the modem.

 

 

Note: Hex $00 replication does not provide the required timing needed for

 

 

generating the TCF frame (1.5 seconds of ‘0’s’).

 

 

If the modem’s transmit buffer empties and the last transmitted character was not

 

 

a NULL, the modem turns off the transmit carrier, returns to command state, and

 

 

sends the “OK” result code to the DTE.

 

 

Note: If the modem is on-hook, the modem always returns an “ERROR”

 

 

message to the DTE after receiving the +FTM = <mod> command.

 

 

Range: <mod> = 24, 48, 72, 73, 74, 96, 97, 98, 121, 122, 145, 146

 

 

Refer to Table 5-2 on page 74.

 

 

 

 

 

Stop Transmission and Pause: The +FTS=<TIME> command causes the mo-

 

 

dem to stop all transmissions. The modem waits for the specified amount of time,

+FTS=n

none

then sends an “OK” result code to the DTE. The value <TIME> is in 10-ms inter-

vals.

 

 

 

 

Range: <TIME> = 0–255 (in 10-ms intervals)

 

 

 

 

 

 

Programmer’s Guide

Intel Confidential

79

Page 79
Image 79
Intel MD566X manual Data using the modulation selected in mod