Hi, I have a 1.8.22 Asterisk (Box A) connected to a 1.4.32 Asterisk box (Box B) through SIP. The 1.4.32 box is then connected to the PSTN through PRIs. I've noticed there are occasions where I am seeing duplicated DTMF. I've verified from the SIP trace from the phone that there is only a single '3' being pressed. It appears as though the DTMF end (without a begin) that is detected on Box B is being turned into a duplicate '3'. Does anyone have an idea how to fix this? Do I need to lower the requested DTMF duration?
Thanks. -- James This is what the DTMF logs look like. Log on Box A (from phone): [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF begin '3' received on SIP/3401-00034777 [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF begin passthrough '3' on SIP/3401-00034777 [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF end '3' received on SIP/3401-00034777, duration 90 ms [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF end accepted with begin '3' on SIP/3401-00034777 [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF end '3' detected to have actual duration 77 on the wire, emulation will be triggered on SIP/3401-00034777 [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF end '3' has duration 77 but want minimum 80, emulating on SIP/3401-00034777 [Jul 3 13:56:24] DTMF[30040] channel.c: DTMF end emulation of '3' queued on SIP/3401-00034777 Log on Box B (from Box A): [Jul 3 13:56:24] DTMF[14562] channel.c: DTMF end '3' received on SIP/dp-pbx0-00022756, duration 0 ms [Jul 3 13:56:24] DTMF[14562] channel.c: DTMF begin emulation of '3' with duration 100 queued on SIP/dp-pbx0-00022756 [Jul 3 13:56:24] DTMF[14562] channel.c: DTMF end emulation of '3' queued on SIP/dp-pbx0-00022756 Log on Box B (from PSTN): [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF begin '3' received on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF begin passthrough '3' on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end '3' received on Zap/41-1, duration 172 ms [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end accepted with begin '3' on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end passthrough '3' on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF begin '3' received on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF begin passthrough '3' on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end '3' received on Zap/41-1, duration 172 ms [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end accepted with begin '3' on Zap/41-1 [Jul 3 13:56:24] DTMF[14568] channel.c: DTMF end passthrough '3' on Zap/41-1
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