[cisco-voip] Silence with Nortel integration

[Bill]

Can anyone else jump on board with this? This is happening more and more but
it is only this single site. I don't think it is layer 3 because they are
all on the same subnet. What logs can I look at and turn on? 



-----Original Message-----
From: matthn at gmail.com [mailto:matthn at gmail.com] On Behalf Of Nick Matthews
Sent: Thursday, May 13, 2010 1:55 PM
To: Bill
Cc: Jason Aarons (US); cisco-voip voyp list
Subject: Re: [cisco-voip] Silence with Nortel integration

I would check your layer2/layer3.  Specific suspicion on anything with
redundancy.  Something like a HSRP address flapping mac's, or equal
cost paths that maybe going up or down, NAT, etc.  My guess is that a
MAC address is flapping for an address in your topology somewhere.
DSPs normally don't stop and start working mid-call, they generally
choose one or the other.

-nick

On Thu, May 13, 2010 at 2:16 PM, Bill <bill at hitechconnection.net> wrote:
> 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.
>
>
>
> ________________________________
>
> 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.
>
>
>
> ________________________________
>
> 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?
>
> ________________________________
>
> 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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