hi,
i am trying to use modem to dial phone,i am able to do it but after some time i get tones like dtmf tones on the receiver phone,i am using javax.comm package for serial communication,i think some additional AT commands other than "ATA " is to be used but could not find.
someone can guide me to the correct way to do so.
it will really be a great help.
thanks in anticipation
prashantharbola
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Jump to PostHere are the most common AT commands
http://www.modemhelp.net/basicatcommand.shtml
I used javax.comm many years ago, and found it to be not very good quality.
Alternatively, under Windows, you can use TAPI (via Com4j or Jacob …
Jump to PostAre you trying to make a voice call or a modem data call? It sounds like your modem is trying to negotiate a data link.
Jump to PostThe modem can be used to automatically dial voice calls when a telephone is connected to it. Placing a semi-colon at the end of a dial string forces the modem to return to on-line command mode after completing the dial string. The modem does not attempt to establish a data …
Jump to PostATA will try to answer the phone in modem mode and negotiate a data connection - that's why you are hearing the tones. You need to answer the call in voice mode.
I've never had to do that, so I have no personal experience of it, but in theory you …
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