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54
4 Business Communications Options
Modem Response Messages
Modem Response Messages
In response to AT modem commands, the modem returns status information in the form of response messages. These
messages appear on the screen when you enter a modem command and press Enter. You can instruct the modem to
return responses in English language words (with the
V1
command) or as numeric values (with the
V0
command).
The most common responses are described in the table below (the numeric equivalents are in parentheses).
Message Description
(00) OK The command was carried out successfully.
(01) CONNECT For
X0
: the modem has made a data connection.
(02) RING Modem is receiving incoming call.
(03) NO CARRIER The remote carrier signal is not detected.
(04) ERROR You typed an invalid command line or a command line that is too long.
(05) CONNECT 1200 Modem is configured to report line speed, which is 1200 bps; or modem is configured to report the DTE speed, which is 1200 bps.
(06) NO DIAL TONE The modem cannot dial the number you specified because there is no dial tone (this response is enabled when the
X2
,
X4
, or
W
modifier is in effect).
(07) BUSY Modem has not detected a busy signal (this response is enabled when
X3
or
X4
are in effect).
(08) NO ANSWER Modem did not detect silence when dialing a command line containing the @ modifier within the time specified by register
S7
.
(09) CONNECT 0600 Modem is configured to report line speed, which is 600 bps; or modem is configured to report the DTE speed, which is 600 bps
(this response is disabled when
X0
is in effect).
(10) CONNECT 2400 Modem is configured to report line speed, which is 2400 bps; or modem is configured to report the DTE speed, which is 2400 bps
(this response is disabled when
X0
is in effect).