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| 4 AT Commands, | |
| &T4 | Enables acknowledgment for remote digital loopback request. | |
| &T5 | Ignores acknowledgment for remote digital loopback request. | |
| &T6 | Requests a remote digital loopback, V.54 Loop 2, without self- | |
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| test. If no connection exists, ERROR is returned. The CON- |
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| NECT XXXX message is displayed at the start of the test. |
| &T7 | Requests a remote digital loopback, V.54 Loop 2, with | |
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| (In |
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| modem.) If no connection exists, ERROR is returned. When the |
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| test is terminated, the number of detected errors is reported to |
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| the computer. |
| &T8 | Starts local analog loopback, V.54 Loop 3, with | |
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| connection exists, the modem hangs up before the test begins. |
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| When the test is terminated, the number of detected errors is |
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| reported to the computer. |
Command: | &V0 |
| Display Current Configuration |
Values: |
| 0 | |
Default: |
| None | |
Description: |
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| Displays the current (active) configuration. |
Command: | &V1 |
| Display Last Connection Statistics |
Values: |
| 1 | |
Default: |
| None | |
Description: |
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| Displays statistics for the last connection. |
Command: | &Wn |
| Store Current Configuration |
Values: |
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| n = 0 or 1 |
Default: |
| None | |
Description: | &W0 |
| Stores current modem settings in nonvolatile memory as Profile 0. |
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| Profile 0 is loaded instead of the factory defaults at |
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| (if &Y0 is set) and by the ATZ command. |
| &W1 |
| Stores current modem settings in nonvolatile memory as Profile 1. |
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| Profile 1 is loaded instead of the factory defaults at |
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| (if &Y1 is set) and by the ATZ1 command. |
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| Note: See also the Z, &F, and &Y commands. |
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Command: | &Xn |
| Synchronous Clock Source |
Values: |
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| n = 0, 1, or 2 |
Default: |
| 0 | |
Description: |
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| Selects the source of the transmit clock for synchronous mode. |
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| In asynchronous mode, the transmit and receive clocks are |
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| turned off. In synchronous mode, the clocks are turned on with |
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| a frequency of 1200 Hz or faster corresponding to the speed |
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| that is selected for modem operation. |
| &X0 |
| Selects internal timing. The modem generates the transmit |
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| clock signal and applies it to the TXCLK output at the serial |
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| interface. |
| &X1 |
| Selects external timing. The local DTE sources the transmit clock |
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| signal on the XTCLK input of the serial interface. The modem |
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| applies this clock to the TXCLK output at the serial interface |
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