Multi-Tech Systems MT128ZLX-ST Uživatelský manuál stáhnout pdf (Strana 245)

MultiMobile MT128ZLX User Guide Appendix D: Using AT Commands

238

Command Options Function & Description

AT!Q=n n=0 Set B-channel speed to 64 K

n=4 Set B-channel speed to 56 K

AT!Z=n B-channel protocol selection

n=05 V.120

n=09 Async to Sync PPP conversion

AT&F Load factory default profile to active RAM.

AT&J0 Use two different ISDN phone numbers for making multi-link PPP calls.

AT&J1 Use single ISDN phone number for Multi-Link PPP connections.

AT&K Verifies TA hardware function; entering AT&K invokes hardware is “OK” or “BAD”.

The “!” command modifier is used to change certain fundamental configuration parameters which are

infrequently changed – typically, only once at installation. Using these “!” commands during normal

operation with the telephone line connected to the Terminal Adapter (TA), can cause unpredictable

results. It is best to issue the “!” command when the TA is not connected to the ISDN network to avoid

confusion between the TA and ISDN network. The recommended procedure for using the “!” commands is

as follows:

(1) Disconnect the ISDN phone line from the TA.

(2) Issue the “!” commands to set the correct value for the “!” command related parameters.

(3) Issue the AT&Wn command to store the parameters changed during step (2) in the user

profile.

(4) Reconnect the ISDN phone line.

(5) Reset or reboot the ISDN sub-system with the updated configuration parameters.

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Multi-Tech Systems MT128ZLX-ST Uživatelský manuál Strana 245