Low, Adam [mailto:[EMAIL PROTECTED] writes: ... > What is the reason for this? Is the PBX actually cancelling > out the DTMF tone after it itself recognises the tone?
No; the phone is sending the information symbolically instead of encoding it using a traditional codec. It's up to the recipient (Asterisk in this case) to interpret them correctly. > Does > it also effect the DTMF tones received over a B channel from the PSTN? Not over a B channel, since those *are* in-band. They're encoded just like voice is. On the other hand, Q.931 specifies a D-channel encoding of keypresses as well. I'm not familiar enough with actual ISDN terminal implementations to know whether they tend to send in-band, out-of-band, or both. I would guess that behavior at Asterisk would depend heavily on this factor. (Note that I don't consider myself an ISDN expert, and my knowledge in this area is only what I can recall after four years.) /a _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
