troubleshooting Question

Asterisk "electrical buzz" noise issue on simultaneous outgoing FXO calls over AEX800 (FreePBX)

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hypervisor asked on
VPNVoice Over IPIP Telephony
9 Comments1 Solution2179 ViewsLast Modified:
Hello:

Running Freepbx (latest).

I have an AEX800 and have configured only 4 of the 8 channels.

Here is my dahdi-channels.conf file:
; Span 1: WCTDM/0 "Wildcard AEX800" (MASTER)
;;; line="1 WCTDM/0/0 FXSKS"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 1
callerid=
context=default

;;; line="2 WCTDM/0/1 FXSKS"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 2
callerid=
context=default

;;; line="3 WCTDM/0/2 FXSKS"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel => 3
callerid=
context=default

;;; line="4 WCTDM/0/3 FXSKS"
signalling=fxs_ks
callerid=asreceived
group=0
context=from-pstn
channel =>   => 4
callerid=
context=default
Asterisk see's the channels:
localhost*CLI> dahdi show channels group 0
   Chan Extension  Context         Language   MOH Interpret        Blocked    State    
      1            from-pstn       en         default                         In Service
      2            from-pstn       en         default                         In Service
      3            from-pstn       en         default                         In Service
      4            from-pstn       en         default                         In Service
localhost*CLI>

I have created one trunk (4 channels) called DAHDI, and reference it in my outbound routes. It is using g0 (see above.)

When I place a outbound call, the sound on the first call is crystal clear. However, when I place a second simultaneous call (and third, fourth), I hear an electrical buzz. The simultaneous calls do go through the correct channels, however all I hear is the above mentioned electrical buzz.

I will also mention that multiple incoming calls do not experience this problem.  Only outgoing.

Any thoughts on what I'm doing wrong?

You can hear the noise by calling +1 301 262 8282 - this hits a ring group which then tries to forward the call out on another channel.

Banging my head against a wall.

Phil
ASKER CERTIFIED SOLUTION
hypervisor

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