What dies the router do to the modem when I first power it on in ASYNC AT dialing mode? Should I put a command or initialization string in the chat script?
A. Compatible routers automatically send a number of AT commands to the modem upon bootup in order to get the modem set up properly for the link. You do need to watch out for DIP switches. ath – Making sure the modem is not on the phone line (hang up) atv1 – Return verbal result codes (as opposed to numerical result codes) at2=43 – Set escape character to ‘+’ (used for hanging up) ats12=50 – Set escape guard time to 1 second (used for hanging up) at&d0 – Ignore DTR ate1 – Turn local echo on (so we can see the commands typed) atq0 – Report status messages at&c1 – Begin testing of DCD (carrier detect) [normal dcd] at&c0 – Testing Contiunued [force dcd] at&c1 – Testing done and final setting [normal dcd] ats0=1 – Set auto answer ring count to 1 if dial-in is enabled Should I put a command or initialization string in the chat script? In general, no. The only case you might do this is if your modem does not save settings. Some command strings introduced in the chat script can modify the set
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