
5. Modem Result Codes
When AT commands are invoked, the modem will respond with either Terse (numeric) or Verbose (text)
result codes. The result code format is set using the Modem Parameters Menu (/M), or the ATVn
command. Result Codes can also be completely suppressed by enabling the Quiet Mode via the Modem
Parameters Menu or the ATQn command.
Note: If desired, the AT&Qn command can be used to configure the SRM to send standard
AT Result Codes or Result Codes with Reliable, Compressed, and LAP-M modifiers.
Verbose
Response
Terse
Response Description
OK 0 Modem Successfully executed a command.
CONNECT 1 Connection made at 300 bps.
RING 2 Modem detected an incoming call.
NO CARRIER 3 Modem lost or could not detect a remote carrier signal within the Register
S7 time.
ERROR 4 Modem found an error in the command line.
CONNECT 1200 5* Connection made at 1200 bps. *
NO DIALTONE 6 Modem did not detect a dial tone within 5 seconds after going off-hook.
BUSY 7 Modem detected a busy signal.
NO ANSWER 8 Five seconds of silence was not detected when using the @ command in
the ATD command.
CONNECT 2400 9* Connection made at 2400 bps. *
CONNECT 4800 11* Connection made at 4800 bps. *
CONNECT 9600 12* Connection made at 9600 bps. *
CONNECT 14400 13* Connection made at 14400 bps. *
CONNECT 19200 19* Connection made at 19200 bps. *
CONNECT 21600 21* Connection made at 21600 bps. *
CONNECT 24000 24* Connection made at 24000 bps. *
CONNECT 26400 26* Connection made at 26400 bps. *
CONNECT 28800 28* Connection made at 28800 bps. *
CONNECT 31200 31* Connection made at 31200 bps. *
CONNECT 33600 33* Connection made at 33600 bps. *
* When MNP error correction is enabled, RELIABLE (or R) is added to these result codes. When
LAP-M enabled, LAP-M (or L) is added. When data compression is enabled, COMPRESSED
(or C) is added. These "Extended" Result Codes are displayed when your modem is set-up using
the X1, X2, X3, or X4 command.
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