[asterisk-users] unable to call AT&T audio conference bridge

BJ Weschke bweschke at gmail.com
Thu Sep 28 07:30:25 MST 2006

On 9/28/06, asterisk-user <myacc at roundbox.com> wrote:
> Hello,
> I have a problem with asterisk and trying to see if someone can help me
> fix the issue...
> Problem:
> I couldn't join AT&T's Tele Conference bridge directly without their
> customer service interaction.
> Instead of getting the automated prompts to join the conference, it
> takes me to the customer support and then I got to give them the bridge
> number and pincode to add me into the conference call.
> The reason given by AT&T was that their conference system is unable to
> identify our tone.
> This happens only with AT&T conference bridges... not sure what the
> problem is.
> This problem started after I installed trixbox on a new hardware.
> Previous setup with asterisk at home <mailto:asterisk at home> did not have
> this issue and I even switched back to asterisk at home
> <mailto:asterisk at home> (a different box) and called the same conf
> bridge... that worked fine.
> I am running trixbox with the following versions:
> asterisk -
> zaptel - 1.2.8
> libpri - 1.2.3-1.349
> using zap over a 8 channel pri
> Thanks in advance.

 AT&T's IVR to collect the passcode is coming through as "early media"
and since you haven't signaled to the phones that the phone is
"answered" they're probably not letting you send DTMF through the
bridge that isn't technically supposed to be there yet.

 Put an Answer() in your dial plan prior to sending the call out to
the Dial() application to reach the bridge for these types of calls
and this generally fixes your problems caused by someone else not
signaling correctly.

Bird's The Word Technologies, Inc.

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