12
M<value> — Speaker Control
Use this command to turn the speaker on and off.
Result codes:
• OK if <value> = 0–3.
• ERROR if <value>
≠
0–3.
Command
Function
M0
Speaker is off.
M1
Speaker is on until the modem detects the
carrier signal (default).
M2
Speaker is always on when the modem is
off-hook.
M3
Speaker is on until the carrier is detected,
except when dialing.
N<value> — Modulation Handshake
Use this command to set the modem protocol for handling handshake
negotiation at connection time if the communication speed of the remote
modem is different from the speed of the local modem.
Result codes:
• OK if <value> = 0–1.
• ERROR if <value>
≠
0–1.
O<value> — Return to On-Line Data Mode
Use this command to exit on-line command mode and reenter on-line data
mode. If the modem is not in on-line command mode when this command is
received the modem generates an ERROR result code.
Result codes:
• CONNECT if <value> = 0, 1, 3 and the result code and call progress
monitor is set to 0 (
X0
).
• CONNECT <rate> if <value> = 0, 1, 3 and the result code and call
progress monitor is not set to 0 (
X<value>
where n = 1–7).
• NO CARRIER if the connection is not successfully resumed.
• ERROR if <value>
≠
0–1, 3.
Command
Function
O0
Instructs the modem to exit on-line command mode
and return to data mode
O1
Issues a retrain before returning to on-line data mode.
O3
Issues a rate renegotiation before returning to on-line
data mode.
