Tickling Contest wrote:
I have a DTMF related question. I understand how to reap DTMF using Asterisk, and related application environments, for example, ARI. See as an example https://wiki.asterisk.org/wiki/display/AST/ARI+and+Channels%3A+Handling+DTMF. While, sending DTMF over a landline phone is slow; I was wondering if there is anyway to send it faster over PSTN for applications using smartphone apps as the SIP UA, so that my PBX connected via a SIP trunk into an Asterisk PBX, can retrieve more information faster (e.g., retrieve a 40-digit DTMF quicker than 1 second). For starters, is it even possible? if so, how have you achieved it? My thinking is, "if fax can do this, there has to be other ways of using DTMF..."
Fax does not use DTMF, it uses a few different other methods to encode data. As for being fast there's a minimum amount of time that a DTMF digit can be for most detectors to recognize it as DTMF, so you can't really blast DTMF that fast.
Do common libraries like PJSIP allow this? What API calls are involved, if so?
We don't use PJMEDIA for that so I can't comment. -- Joshua Colp Digium, Inc. | Senior Software Developer 445 Jan Davis Drive NW - Huntsville, AL 35806 - US Check us out at: www.digium.com & www.asterisk.org _______________________________________________ asterisk-app-dev mailing list asterisk-app-dev@xxxxxxxxxxxxxxxx http://lists.digium.com/cgi-bin/mailman/listinfo/asterisk-app-dev
