We have this from time to time. It's usually someone using a cheap headset
that's turned up too high. Polycom's have some settings you can tweak to
cancel out the echo, although they're not supported. We used them for a
short while, but they seemed to interfere with the echo can on our Sangoma
card, so we had to set them back to default.
You might want to see if Aastra phones offer some type of internal echo can,
if there are cheap headsets being used (the person not hearing the echo
should turn his/her volume down), or if there's one phone in particular
causing problems (could be a bad network cable or NIC on the phone).
On 1/23/07, Carlos Chavez [EMAIL PROTECTED] wrote:
I have a customer running Asterisk 1.2.13, Zaptel 1.2.11 with a
TE110P,
a TDM04B and an Astribank-32. They have been complaining that there is
echo on calls even when they are IP to IP on the same network. There
are 18 Aastra 9133i phones and 30 analog phones connected to the
Astribank. I can understand there being a bit of echo on the analog
phones, but I do not understand why there would be echo on the SIP
phones when they are all using ALAW/ULAW and are on the same local
network. I even have QoS configured on the Linksys SRW224P switch to
give priority to the voice services.
--
Telecomunicaciones Abiertas de Mexico S.A. de C.V.
Carlos Chávez Prats
Director de Tecnología
+52-55-91169161 ext 2001
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