[cisco-voip] Silence with Nortel integration

[Bill]

Ok so this issue has come up again. It now appears, much to my dismay that
it is not only with the Nortel integration. I have had complaints on other
calls including IP phone to IP phone. The IP Phones are on the same network,
same VLAN and even the same switch. It is a 4510 switch that is fully
loaded. I only have about 100 IP phones it now the rest are data
connections.  It almost seems like an IP routing issue because the call only
drops one way and it eventually comes back as long as no one hangs up. 

 

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From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Bill
Sent: Wednesday, April 28, 2010 3:25 PM
To: 'Jason Aarons (US)'; 'cisco-voip voyp list'
Subject: Re: [cisco-voip] Silence with Nortel integration

 

All other H.323 calls to this gateway work fine. Only when going over the
PRI that is connected to the Nortel. As much as I would like to point the
finger there I need some very hard evidence to go that route. 

 

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From: Jason Aarons (US) [mailto:jason.aarons at us.didata.com] 
Sent: Wednesday, April 28, 2010 3:21 PM
To: Bill; 'cisco-voip voyp list'
Subject: RE: [cisco-voip] Silence with Nortel integration

 

I'd get a sniffer up on 3845s Ethernet port and watch the H225/H245 packets.
Got another H323 endpoint you could test with to narrow down it's a Nortel
issue?

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From: cisco-voip-bounces at puck.nether.net
[cisco-voip-bounces at puck.nether.net] On Behalf Of Bill
[bill at hitechconnection.net]
Sent: Wednesday, April 28, 2010 4:08 PM
To: 'cisco-voip voyp list'
Subject: [cisco-voip] Silence with Nortel integration

I have a 3845 configured as an h.323 gateway. I have four PRI's connected to
this gateway from the PSTN. I also have a single PRI connected to this same
gateway used as a tie line to a Nortel system. I have had no complaints on
calls going or coming from the PSTN. I have had several complaints on calls
to and from the Nortel box. The call could be setup fine and you are talking
but the call basically goes silent for about 10 - 15 seconds. The call does
not drop only silence. Also if you stay on the call the audio starts up
again. I don't think it is an IP routing issue because calls to the PSTN
work correctly and calls do work to the Nortel it just will stop for a few
seconds. There are no slips and no errors on the line. 

 

 

 


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