US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Instrukcja Użytkownika Pobierz pdf (Strona 26)

56K Softmodem

Command Reference

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Table 3-22: &C<value> Commands

&D<value>—Data Terminal Ready (DTR) Control

Use this command to set how the 56K Softmodem responds to the DTR signal.

Result codes:

OK if <value> = 0—3.

ERROR if <value> does not equal 0—3.

Table 3-23: &D<value> Commands

Note:ITU-T Recommendation V.250 (05/99) standardized this command. However, the standard does not

include the additional functionality added with the D3 command.

&F<value>—Restore Factory Default Configuration

Use this command to reset the modem to the configuration programmed at the

factory. This operation replaces all of the command options* and S-register

settings in the active configuration with factory default values.

Result codes:

OK if <value> = 0.

ERROR if <value> does not equal 0.

Command Function

&C0 Modem ignores the state of the carrier from the remote modem. DCD remains on at all times.

&C1 Modem turns on DCD when the remote modem’s carrier signal is detected and turns off DCD

when the carrier signal is not detected (default).

Command Function

&D0

The 56K Softmodem ignores the true status of DTR and treats it as always on. Use this

selection only if the computer does not provide DTR to the modem.

&D1 If the DTR signal is not detected while in on-line data mode, the modem enters command

mode, issues the OK result code, and remains connected.

&D2 If the DTR signal is not detected while in on-line data mode, the modem disconnects

(default).

&D3* Reset modem on the on-to-off DTR transition.

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US Robotics 56 K SOFTMODEM - COMMAND REFERENCE REV 1 Instrukcja Użytkownika Strona 26