L
Microphone Control
This command turns the headset microphone on or off. Typically, the microphone is automatically
muted when dialing begins and remains muted until dialing is complete. This command may be used
in conjunction with the D command to keep the microphone off until a voice or other call progress re-
sponse is confirmed. Will not override any subsequent hang up or D commands that reset the
microphone status.
L or L0
Microphone off
This command turns the microphone off.
L1
Microphone on
This command turns the microphone on.
For example, ATD1234567L0<CR> would mute the microphone after the dial sequence. The micro-
phone will be unmuted when “VOICE” or “RB LOST” is validated. To force the microphone to unmute
at any time, send ATL1<CR> to the T-311.
M
Call Progress Message Display Definition
This command determines the circumstances under which messages are displayed. Please note that
this command works in conjunction with the Q (message display on/off) and V (verbose mode) com-
mands.
Note:
The T-311 M command serves a different function than the Hayes AT M command, which
operates the modem speaker.
M or M0
No messages
No call progress messages are displayed.
M1
Messages (without line verification)
Call progress messages are displayed until answer (without line verification* (call progress)).
M2
Messages (with line verification)
This command displays call progress messages until answer (with line verification*).
(Default)
*Line verification is used to validate on- and off-hook, flash, and dial pulse.
N
Display Stored Number
This command displays the telephone number that previously stored using the AT&Z command.
Q
Quiet Mode: Display Messages on/off
This command determines whether messages are or are not displayed. It must be enabled (Q or Q0)
for the M command to operate. The format of the messages is set by the V command.
Q or Q0
Display on
This command Messages are displayed (as determined by M and V command settings)
(Default)
Q1
Display off
This command No messages are displayed.
Reference Manual
Chapter 8: Commands
40-400-00045, Rev.
B
Page 27