MultiModemDSVD User Guide |
| 4 AT Commands, | |
Command: | &Zy=x |
| Store Telephone Number |
Values: |
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| y = |
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| x = Dialing command |
Default: |
| None | |
Description: |
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| Stores telephone dial string x in memory location y. Each tele- |
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| phone number dial string can contain up to 34 digits. Dial the |
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| stored number using the command ATDS=y. |
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| Note: DTR dialing uses the number stored in memory location 0. |
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Command: | %Cn |
| Data Compression Control |
Values: |
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| n = 0, 1, 2, or 3 |
Default: |
| 3 | |
Description: |
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| Enables or disables data compression negotiation. The modem |
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| can only perform data compression on an |
| %C0 |
| Disables data compression. |
| %C1 |
| Enables MNP 5 data compression negotiation. |
| %C2 |
| Enables V.42bis data compression negotiation. |
| %C3 |
| Enables both V.42bis and MNP 5 data compression negotiation. |
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| Note: This command controls both V.42bis and |
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| compression, whereas the &E14 and &E15 commands control |
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| only V.42bis data compression. The command in effect is the |
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| one last entered. |
| %En |
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Command: |
| Line Quality Monitor | |
Values: |
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| n = 0, 1, or 2 |
Default: |
| 2 | |
Description: |
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| Controls whether or not the modem will automatically moni- |
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| tor the line quality and request a retrain (%E1) or fall back to a |
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| lower speed when line quality is insufficient and fall forward |
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| to a faster speed when line quality is sufficient (%E2). |
| %E0 | Disable line quality monitor and | |
| %E1 | Enable line quality monitor and | |
| %E2 |
| Enable line quality monitor and fallback/fall forward. |
Command: | %L |
| Line Signal Level |
Values: |
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| None |
Default: |
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| None |
Description: | %L |
| Returns a value that indicates the received signal level. The |
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| value returned is a direct indication |
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| receive level at the MDP, not at the telephone line connector. |
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| For example, 009 = |
Command: | %Q |
| Line Signal Quality |
Values: |
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| None |
Default: |
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| None |
Description: | %Q |
| Reports the line signal quality |
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| digit number. Returns the higher order byte of the EQM value. |
Based on the EQM value, retrain or fallback/fall forward may be initiated if enabled by %E1 or %E2.
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