Good day list, I have been fighting echo problems on my PRI card.
Everything is working great outbound, however inbound calls have echo. I have found the issue but need help in fixing it. During outbound calling "zap show channel 18" shows that the call is off-hook and echo cancellation is running. During inbound calling though, "zap show channel 18" shows that the call is "ON-HOOK" and echo cancellation is turned off. I have no ideas as to how or why this is happening. Any input is greatly appreciated. ~ron [CLI DIAGNOSTICS:] *CLI> zap show channels Chan Extension Context Language MusicOnHold pseudo from-pstn en 18 5134632401 from-pstn en 19 5134632401 from-pstn en 20 from-pstn en 21 from-pstn en 22 from-pstn en 23 from-pstn en *CLI> zap show channel 18 Channel: 18CLI> File Descriptor: 19 Span: 1 Extension: 5134632401 Dialing: no Context: from-pstn Caller ID string: 5137777486 Destroy: 0 InAlarm: 0 Signalling Type: PRI Signalling Owner: Zap/18-1 Real: Zap/18-1 Callwait: <None> Threeway: <None> Confno: -1 Propagated Conference: -1 Real in conference: 0 DSP: yes Relax DTMF: no Dialing/CallwaitCAS: 0/0 Default law: ulaw Fax Handled: no Pulse phone: no Echo Cancellation: 128 taps, currently OFF PRI Flags: Call PRI Logical Span: Implicit Actual Confinfo: Num/0, Mode/0x0000 Actual Confmute: No Actual Hookstate: Onhook [Zapata.conf] [channels] language=en signalling=pri_cpe ; pri_cpe = PRI slave ; pri_net = PRI master switchtype=national pridialplan=unknown echocancel=yes ; You can set this to 32, 64, or 128, tweak to your needs. echocancelwhenbridged=yes echotraining=400 ; Asterisk trains to the beginning of the call, number is in milliseconds usecallerid=yes callerid=asreceived overlapdial=yes immediate=no group=0,1 context=from-pstn channel => 18-23 ; Set this to 1-15,17-31 for E1 [ZAPTEL.conf] span=1,1,0,esf,b8zs bchan=18-23 # set this to 1-15,17-31 for E1 dchan=24 # set this to 16 for E1 defaultzone=us loadzone=us
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