AT command set result codes
AT command set result codes
The following table shows the result codes:
Command Set Result Codes Table
Result Code | Numeric | Description |
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OK | 0 | Command executed |
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CONNECT | 1 | Modem connected to line |
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RING | 2 | A ring signal has been |
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| detected |
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NO CARRIER | 3 | Modem lost carrier signal, or |
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| does not detect carrier signal, |
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| or does not detect answer |
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| tone |
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ERROR | 4 | Invalid command |
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CONNECT 1200 EC* | 5 | Connection at 1200 bps |
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NO DIAL TONE | 6 | No dial tone detected |
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BUSY | 7 | Busy signal detected |
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CONNECT 2400 EC* | 10 | Connection at 2400 bps |
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CONNECT 4800 EC* | 11 | Connection at 4800 bps |
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*EC appears only when the Extended Result Codes configuration option is enabled. EC is replaced by one of the following symbols, depending upon the error control method used:
V.44 - V.44 data compression with V.42 error control
V.42bis - V.42 error control and V.42bis data compression
V.42 - 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