Hey All, I have an Asterisk box connected to a Nortel Option 11C via a T1. In the Asterisk box we have a Sangoma A101C and in the Nortel we have a TMDI card. The Nortel is also hooked to the PSTN via a T1 on a different NTAK09 PRI card. I've included the Zapata.conf and zaptel.conf files below.
Our issue is that when a call is sent over the tie line between the two systems, the audio on the Asterisk side is terrible. There are rapid 'clicks' on it similar to when you have a cell phone close to an analog phone or a set of computer speakers. The clicks start as soon as the audio channel is opened (when I start to get rings) and it only affects the Asterisk side of the call. But, it affects both inbound and outbound audio on that side. On the Nortel side, the audio they hear is soft and distorted. On the Asterisk side, the audio they hear is full of the clicking but broken thru when the caller speaks. It's almost like the 'silence packets' are being interpreted wrong by Asterisk. If I put the Asterisk box on the T1 for the PSTN, it works perfect. The best part of all this... if we disable the TMDI card in the Nortel and then re-enable it, the audio is pristine... until the Nortel runs it's nightly maintenance routines. Then the noise is back the next day. We can always clear the problem with the disable/re-enable trick but it always come back after maintenance. We've been through tech support with Sangoma and we are confident it isn't the Sangoma card. We've had the TMDI card replaced in the Nortel and we still have the problem. Pure IP calling on the Asterisk box works fine so it isn't between the phones and Asterisk. I'm now completely out of ideas and I'm looking for some direction to go here. Does anybody have any ideas? I desperately need some help. TIA, Jason Asterisk 1.2.18 built by root @ build.trixbox.org on a i686 running Linux on 2007-05-08 22:33:23 UTC # Zaptel Channels Configurations (zaptel.conf) # loadzone=us defaultzone=us #Sangoma A101 port 1 [slot:14 bus:0 span: 1] span=1,0,0,esf,b8zs bchan=1-23 dchan=24 ; ; Zapata telephony interface ; ; Configuration file [trunkgroups] [channels] language=en context=from-zaptel signalling=fxs_ks rxwink=300 ; Atlas seems to use long (250ms) winks ; ; Whether or not to do distinctive ring detection on FXO lines ; ;usedistinctiveringdetection=yes usecallerid=yes hidecallerid=no callwaiting=yes usecallingpres=yes callwaitingcallerid=yes threewaycalling=yes transfer=yes cancallforward=yes callreturn=yes echocancel=yes echocancelwhenbridged=no echotraining=800 rxgain=0.0 txgain=0.0 group=0 callgroup=1 pickupgroup=1 immediate=no ;faxdetect=both faxdetect=incoming ;faxdetect=outgoing ;faxdetect=no ;Include genzaptelconf configs #include zapata-auto.conf group=1 ;Include AMP configs #include zapata_additional.conf _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users