AT Commands

I have been setting up an Aastra MX-ONE PABX, and to allow us remote access to the PABX I have had to setup a modem for remote dialling in. Hopefully the following will be helpful:

To setup an AT compatible modem to answer on the first ring enter the command ATS0=1. (Register 0 disables answering and 2 allows answer after 2 rings, etc.)

To keep the setting even if the modem restarts, enter command AT&W0 to save the active configuration into the modems non-volatile memory. To display the global settings of the modem, enter AT&V. To understand the output, you may have to use Google with the search parameters "AT S registers".