[Solved] I also used tone_detect to hangup the PSTN line. FreeTDM can detect call progress tone (busy, disconnect) BUT ... as mentioned above it detects TONES ONLY NOT CADENCE. It works if 2 or more tones are used even w/o detecting the cadence. It's becomes a problem when only one tone is used. To detect cadence, mod_spandsp is recommended http://wiki.freeswitch.org/wiki/Mod_spandsp#Call_Progress It fires Events so a script is needed to catch them and fire the hangup signal. /Nandy On Tue, Oct 22, 2013 at 6:05 PM, xmppser <xmppser@gmail.com> wrote:
Hi， I have this issue also, I use sangoma A400, use sip phone call pstn mobile, when mobile hangup, the sip phone can not hangup, i have add tone_detect app in dialplan, it seems sangoma A400 and freetdm can not detect busy tones or disconct srperversion from pstm. but asterisk & zaptel have this detect.
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