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Chapter 2 – Fax Class 1 and 1.0 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 38
Command: +FRS Receive Silence
Description: This command causes the modem to listen and report an OK result code
when silence has been detected on the line for the specified period of time.
This command will terminate when the required period of silence is detected
or when the DTE sends the modem another character other than XON or
XOFF, which is discarded. In either event, the OK result code is returned.
This command is aborted if any character is received from the DTE after
receipt of the command but before the time delay elapses. In this case, the
modem discards the aborting character and issues an OK result code.
Defined Values: <time> Decimal number from 0 (default) to 255 which specifies the length of
time in 10-ms intervals to delay before responding with the OK result code
after detecting silence on the line.
Result Codes: OK Reported when silence has been present on the line for the specified
amount of time or when the DTE sends the modem a character other than
XON or XOFF.
ERROR <value> is invalid or this command is issued while the modem is on-
hook.
Reporting Supported Range of Parameter Values:
Command: +FRS=?
Response: +FRS: <time> range
Example: +FRS: 0-255
Command: +FTM Transmit Facsimile
Description: This command causes the modem to transmit data using the modulation
defined below. When a valid <mod> value is entered, the modem transmits
the proper training sequence in the selected mode, followed by constant 1 bits
until data is received from the DTE. The modem also returns the CONNECT
result code at the beginning of the training sequence.
Defined Values: <mod> Decimal number corresponding to the selected modulation mode and
data rates shown in Table 3-2.
Table 3-2. Fax Class 1 and Fax Class 1.0 Modulation Modes and Rates
<mod> Modulation Training Modulation Mode and Rate
3
V.21
300 bps
24
V.27 ter
2400 bps
48
V.27 ter
4800 bps
72
V.29
7200 bps
73
V.17 Long 7200 bps long
74
V.17 Short 7200 bps short
96
V.29
9600 bps
97
V.17 Long 9600 bps long
98
V.17 Short 9600 bps short
121
V.17 Long 12000 bps long
122
V.17 Short 12000 bps short
145
V.17 Long 14400 bps long
146
V.17 Short 14400 bps short