5.1.2 Result Codes
Result Codes refer to the responses of the cellular modem unit to a command.
Unless the cellular modem has been programmed to be in the Quiet mode (Section 6.1), the unit will respond each time a command is issued. The default mode of the cellular modem is the verbose mode. The responses in the verbose mode are characters.
Using AT commands, the modem can be put into terse
Various modem responses are shown below:
Terse Mode | Verbose Mode | Description |
0 | OK | Command executed without errors. |
1 | Connect | Connection at 300 bps |
2 | Ring | Ringing signal detected |
3 | No Carrier | Carrier lost or never present |
4 | Error | Invalid command |
5 | Connect 1200 | Connection at 1200 bps |
6 | No Dial tone | Cellular service not available |
7 | Busy | Called party |
8 | No Answer |
|
9 | Connect 0600 |
|
10 | Connect 2400 |
|
11 | Connect 4800 |
|
12 | Connect 9600 |
|
13 | Connect 7200 |
|
66 | Compression class 5 | Connection established MNP- 5 |
67 | Compression V42bis |
|
68 | Not used |
|
69 | Compression none |
|
76 | Protocol: none |
|
77 | Protocol: LAPM |
|
99 | Service Unavailable | Cellular Service not available |
100 | Service Available | Unit ready for communication |
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