On Wed, 18 Jan 2006, Kevin P. Fleming wrote:
> Max Glucksmann wrote: > > > - RFC2833 standard configured on both end-points. > > If this is the case, but the end sending DTMF _also_ puts it inband, > then it is broken. This is an either/or setting; it's either inband or > out of band, but not both. > > Asterisk sometimes listens for inband DTMF even when RFC2833 has been > specified because the SDP tells us what the peer wants to _RECEIVE_, not > necessarily what it will send. There are devices out there that will > tell us they want RFC2833 but send only inband... many devices are just > broken and/or inconsistent. Hi Kevin, I have seen the following effect in Asterisk, though: where it converts an inband DTMF (eg coming off a Zap channel) into an indication, it mutes the audio where that tone is. But sometimes it leaves a teeny bit of the tone behind. If you take such a call over say IAX to somewhere and then back out a Zap channel, you end up with the teeny remaining bit of the original tone, PLUS the regenerated tone. If you are very unlucky a remote DTMF receiver can hear two digits. Steve _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
