[cisco-voip] Setting up local DSP resources on 2821

[Erik Erasmus (E)]

Most of them

I also have some sample configs on my laptop at work which I will make
available tomorrow. I managed to get hardware assisted (enhanced IOS)
conferencing on a router going nicely after reading the docs and
getting help from the group. And it is fairly simple to get it
configured in CCM as a media resource.

I also managed to find out the following useful info. cisco often
refers to DSPs and how many conferences etc one can do per DSP. I
figured out now that as far as PVDM2s go a PVDM2-16 counts as one DSP,
a 2-32 counts as 2 and a 2-48 as three and 2-64 as 4. Plus that
generaly for G711 a single DSP (that is one chip on the PVDM can do 8
x 8 meaning 8 conferences with 8 participants. This usually drops to
something like 2 x 8 if you also allow G729 to conference in.

Also - avoid a PVDM2-8 as far as conferencing go because it is limited
because it counts as a half DSP. Using a different chip to the rest.
It can handle a very small conference apparently but I have not tried
it. Also keep in mind that a single chip can only handle conferencing
and no other function at the same time -- that is share for other
services like transcoding and MTP. However - a single PVDM can do
multiple things like transcoding, conferencing etc as long as
conferencing has at least a dedicated dsp on the PVDM.

A lot of people are also worried about transcoding - normally when
they have remote branches with G729 across a wan for onnet call to a
central site and both the HQ and reote site use G711 in the site. This
is not nromally true. The cisco IP phones supports G729 natively and
if you have your regions (for codec selection) and locations correctly
configured the call manager signalling will tell a remote phone to use
the G729 codec when talking onnet to an HQ phone across the IP wan.

still learning so I hop I have it correct here.

erik erasmus
Telkom SA


________________________________

From: Ortiz, Carlos [mailto:CORTIZ at broward.org]
Sent: Wed 2006-09-06 20:02
To: Erik Erasmus (E); Ted Nugent; Wydra, Jason;
cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] Setting up local DSP resources on 2821



Were the questions regarding DSPFARM configs in the email below ever
answered?

I have configured my DSPFARM on a 2811 but how do you actually make
these resources the first choice for the users at that remote site?  I
assume some configuration in the conf bridge resources and MRGL but I
can't find a doc specifically for the 2800 routers.  Anyone have a
link?

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Erik Erasmus
(E)
Sent: Tuesday, July 18, 2006 3:20 PM
To: Ted Nugent; Wydra, Jason; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Setting up local DSP resources on 2821


Hi Ted

Sounds like you have done it a couple of times.

Q1. I notice in the config examples they have an example that has

voice-card 1
no dspfarm
dsp services dspfarm

bit confusing - why no dsprarm and right below it dsp services dspfarm
???

Q2. They also show
associate profile 10 register CFB123456789966
associate profile 6 register MTP123456789988

where does the values after register come from - are they arbitrary
things one choose and need to be unique per site and per profile I
register etc.???


oip




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