[cisco-voip] OT: Is there a Nortel equivalent to this list?

Dale Shaw dale.shaw+cisco-voip at gmail.com
Tue May 19 08:34:27 EDT 2009

Hi Erik,

On Tue, May 19, 2009 at 4:21 PM, Erik Goppel <egoppel at gmail.com> wrote:
> a lot of people working for system integrators (like myself) are on this
> list, and could point you in the right direction (cisco :-) )
> I work for an integrator that also does Nortel, and i could ask my
> colleauges about your questions.

Thanks for the offer of help.

I'm trying to get some real information around an 80ms RTT threshold
for signalling traffic between the central CS1000 call processing
server and the remote media gateway. Apparently when this threshold is
exceeded, the media gateway is designed to reload itself. This is by
design, and the 80ms threshold is a hard limit.

I am trying to get more information about how this round trip delay is
measured -- i.e. using what transport protocol, is it a sliding event
window type system (where a certain number of probes within a fixed
window need to return >80ms RTTs), and so on. Getting information out
of Nortel about what traffic to prioritise across the WAN has been

We give low latency queuing treatment to voice payload across the WAN,
but we're trying to limit the amount of signalling traffic we give
latency guarantees to -- there is an extremely long list of UDP and
TCP-based protocols active between the endpoints.


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