V.22Bis Guard Tone Control; Local Flow Control Selection; Leased Line Operation; Pulse Dial Make-To-Break Ratio Selection - Multitech MultiModem SocketModem MT9234 Series At Commands Reference Manual

&G
Description:
Syntax:
Values:
Default:
Result Codes:
&K
Description:
Syntax:
Values:
Default:
Result Codes:
&L
Description:
Syntax:
Values:
Default:
Result Codes:
&P
Description:
Syntax:
Values:
Default:
Result Codes:
Multi-Tech Systems, Inc. AT Commands for the MultiModem & SocketModem MT9234 Series (S000434H)
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Chapter 1 – AT Commands, S-Registers, and Result Codes

V.22bis Guard Tone Control

Use this command to select which guard tone, if any, the modem will send while
transmitting in the high band (answer mode). This command is only used in V.22 and
V.22 bis mode. This option is not used in North America; it is for international use
only.
AT&G<value>
0 Disables guard tone.
1 Sets guard tone to 550 Hz.
2 Sets guard tone to 1800 Hz.
0
OK if <value> = 0 to 2.
ERROR if <value> ≠ 0 to 2.
Note: The &G command is not used in North America.

Local Flow Control Selection

Use this command to select a flow control method.
AT&K<value>
0 Disables flow control.
3 Enables CTS/RTS hardware flow control.
4 Enables XON/XOFF software flow control.
3
OK if <value> = 0, 3, or 4.
ERROR if <value> ≠ 0, 3, or 4.

Leased Line Operation

Sets standard dial-up or leased-line operation. Note: This command does not apply
to all models or build options.
AT&L<value>
0 The modem is set for standard dial-up operation.
1 The modem is set for leased line operation in originate mode.
2 The modem is set for leased line operation in answer mode.
0
Note: For &L1 and &L2, there is a 30-second window between power up and the
starting of the leased line handshake. During this time, you can turn off the
command, if desired.
OK if <value> = 0 to 2.
ERROR if <value> ≠ 0 to 2.

Pulse Dial Make-to-Break Ratio Selection

Use this command to select the make-to-break ratio. This command is effective only
for Japan.
AT&P<value>
0 Selects 39% to 61% make-to-break ratio at 10 pulses per second.
1 Selects 33% to 67% make-to-break ratio at 10 pulses per second.
2 Selects 33% to 67% make-to-break ratio at 20 pulses per second.
1
Note: The &P2 command is available only if the country/regional code is set to
Japan.
OK if <value> = 0 to 2.
ERROR if <value> ≠ 0 to 2.
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