[asterisk-users] Inhouse SIP to ZAP has echo sometimes.

[BerkHolz, Steven]

Sometimes we get echo heard on SIP phone when dialing out.
 
Zap channel is on a TE411 Card.
It is using a PRI to XO.
 
As far as I know echo is created on the far side.
Could the Zaptel card be the far side as far as the SIP phone is
concerned?
 
Calls from our soon to retire legacy PBX do not have this problem.
Those calls are Legacy - PRI - asterisk -PRI - XO - Dest.
 
 
Any suggestions?
 
 
 
 
 
 
Zaptel.conf:
 
context=from-pstn
switchtype=national
pridialplan=unknown 
prilocaldialplan=unknown
priindication=inband
signalling=pri_cpe
usecallerid=yes
hidecallerid=no
usecallingpres=yes
echocancel=yes
echocancelwhenbridged=yes
echotraining=yes
group=0
callgroup=1
pickupgroup=1
useincomingcalleridonzaptransfer=yes
callerid=asreceived
accountcode=I
musiconhold=default
overlapdial=no
facilityenable=yes
nsf=none
channel => 1-23
 
I also set "static int vpmdtmfsupport = 0;" in wct4xxp.c to remove
sporotic DTMF tones.
 
 
 
 
 

 

Thank You,

Steven BerkHolz
- MCSA - MCSE -
Manager of Information Systems
TESCO Group Companies
Fax. 248-836-5101
www.TESCOGroup.com

Board member of
www.glimasoutheast.org

 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20061013/bd0b496b/attachment.htm