[Asterisk-Users] Bizarre Echo Problem

[Mark Edwards]

Before I relate the actual problem, some context.

Callcentre environment, a few users testing a new digital dialer...

1. Agents are using Grandstream ATA HT486 and a small analogue dialpad with
a headset.
2. SIP connection to Asterisk-1.2b1
3. IAX2 connection to ITSP provider.

The call is initially set up in the following way.

1. Agent calls into a meetme conference room and subseqently stays in the
conference room working offhook.
2. Dialler originates calls from the meetme conference room to the target
party.

Problem...

1. every now and then the agent experiences large amounts of echoing of
their own voice (not the target party). It's not consistent, just every now
and again. The echo is of quite a long delay...

My assumptions....

1. Because the call setup has occurred and there are calls where there is no
echo, it can't be the callcentre end of the connection causing the echo
2. There is nothing I can do to fix the echo problem at my end becuase the
echo would need to be dealt with in the ATA and it's already cancelling
echo.

Question...

1. Do I need to go have a little chat to my ITSP
2. Is there anything else that can be done?

cheers,

Mark.
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