Result Codes - US Robotics 56K USB Modem User Manual

Result Codes

The modem's AT command handler responds to commands from the caller and to activity on the line via
result codes. Table 225 presents a summary of these result codes.
Two forms of each result code are available. The long-form, or verbose, response is given when V1 is
selected, and the short-form, data-like numeric response is given when V0 is selected. The long-form code
is preceded and terminated by the sequence <CR> <LF>. The short-form is also terminated by <CR>, but
it has no preceding sequence. If result codes are suppressed, nothing is returned to the caller.
Table 225. Result Code Summary
Result Code
OK
CONNECT
RING
NO CARRIER
ERROR
CONNECT 1200 EC*
NO DIALTONE
BUSY
NO ANSWER
CONNECT 2400 EC*
CONNECT 4800 EC*
CONNECT 9600 EC*
CONNECT 14400 EC*
CONNECT 19200 EC*
CONNECT 7200 EC*
CONNECT 12000 EC*
CONNECT 16800 EC*
CONNECT 300 EC*
CONNECT 21600 EC*
CONNECT 24000 EC*
CONNECT 26400 EC*
CONNECT 28800 EC*
CONNECT 31200 EC*
CONNECT 33600 EC*
CONNECT 38400 EC*
CONNECT 57600 EC*
CONNECT 115200 EC*
* EC only appears when the extended result codes configuration option is enabled. EC is replaced by one of the following symbols,
depending on the error control method used:
V.44—V.44 data compression.
V42bis—V.42 error control and V.42bis data compression.
V42—V.42 error control only.
MNP 5—MNP class 4 error control and MNP class 5 data compression.
MNP 4—MNP class 4 error control only.
NoEC—no error control protocol.
Numeric
Code
0 Acknowledges the execution of a command line.
1 Modem connected to line.
2 Incoming ring signal has been detected.
3 Modem lost carrier signal, does not detect carrier signal, or does
not detect answer tone.
4 Invalid command.
5 Connection at 1200 bits/s.
6 No dial tone detected.
7 Busy signal detected.
8 Remote end never answered.
10 Connection at 2400 bits/s.
11 Connection at 4800 bits/s.
12 Connection at 9600 bits/s.
13 Connection at 14400 bits/s.
14 Connection at 19200 bits/s.
24 Connection at 7200 bits/s.
25 Connection at 12000 bits/s.
86 Connection at 16800 bits/s.
40 Connection at 300 bits/s.
55 Connection at 21600 bits/s.
56 Connection at 24000 bits/s.
57 Connection at 26400 bits/s.
58 Connection at 28800 bits/s.
59 Connection at 31200 bits/s.
60 Connection at 33600 bits/s.
28 Connection at 38400 bits/s (DTE rate).
18 Connection at 57600 bits/s (DTE rate).
87 Connection at 115200 bits/s (DTE rate).
56K USB Modem
Description
Command Reference - 107
User Guide