MultiModemII User Guide
Command: | &Qn | Sync/Async Mode |
Values: |
| n = |
Default: |
| 5 |
Description: |
| This command is an extension of the &M command, and is used |
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| to control which connection modes are permitted. It is used in |
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| conjunction with S36 and S48. (See also the \N command.) |
| &Q0 | Selects direct asynchronous operation. See &M0. |
| &Q1 | Selects synchronous connect mode with asynchronous offline |
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| command mode. See &M1. (Serial interface operation only.) |
| &Q2 | Selects synchronous connect mode with asynchronous offline |
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| command mode and enables DTR dialing of directory 3. See |
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| &M2. (Serial interface operation only.) |
| &Q3 | Selects synchronous connect mode with asynchronous offline |
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| command mode and enables DTR to act as a talk/data switch. |
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| See &M3. (Serial interface operation only.) |
| &Q5 | The modem will try to negotiate an |
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| modem can be configured using S36 to determine whether a |
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| failure will result in the modem disconnecting or falling back |
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| to a |
| &Q6 | Selects asynchronous operation with speed buffering and no |
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| error correction. Same as \N0. |
Command: | &Rn | Clear to Send (CTS) Control |
Values: |
| n = 0 or 1 |
Default: |
| 1 |
Description: | &R0 | Let the CTS state follow the RTS state when online.. |
| &R1 | Force CTS high (ON). |
Command: | &Sn | Data Set Ready (DSR) Control |
Values: |
| n = 0 or 1 |
Default: |
| 0 |
Description: | &S0 | Force DSR high (on) at all times. |
| &S1 | Let DSR go high only during a connection. |
Command: | &Tn | V.54 Test Commands |
Values: |
| n = 0, 1, 3, 4, 5, 6, 7, or 8 |
Default: |
| None |
Description: |
| The modem can perform selected test and diagnostic functions. A |
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| test can be run only when the modem is in asynchronous op- |
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| eration in |
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| For tests 3, 6, and 7, a connection between the two modems |
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| must first be established. To terminate a test in progress, the |
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| escape sequence (+++) must be entered first, except for param- |
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| eters 7 and 8. If S18 is |
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| after the time specified by S18 and displays the OK message. |
| &T0 | Abort. Stop any test in progress. |
| &T1 | Start local analog loopback, V.54 Loop 3. If a connection exists |
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| when this command is issued, the modem hangs up. A CON- |
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| NECT message is displayed at the start of the test. |
| &T3 | Start local digital loopback, V.54 Loop 2. If no connection exists, |
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| ERROR is returned. |
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