Re: DSP (PVDM-32) Hardware conference bridge setup on Cisco 2800 gateway

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Sep 28th, 2009


I have a cisco 2821 gateway and I would like to setup hardware based conference usig PVDM-32 card installed. What steps do I need to configure on the gateway to get this working?

I have this problem too.
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Nicholas Matthews Mon, 09/28/2009 - 12:02

Briefly, it is this:

voice-card 0


dspf pro 1 conference

ass app sccp

max sessions <1-4>

no shut

sccp local

sccp ccm 1 id 1 version

sccp ccm group 1

ccm 1 priority 1

associate pro 1 register NAMEOFDEVICE

That should get you going.


Nicholas Matthews Wed, 09/30/2009 - 05:36

That command is for something slightly different - dspfarm is the command for using the DSPs for media resources.


m-laing Wed, 09/30/2009 - 10:45


When I try to setup the dspf profile I am not able to set the number of sessions. Is there a command I need to enter to use the pvdm-32 card for conference?

How do I view the dsp cards installed on the router?

Jaime Valencia Wed, 09/30/2009 - 11:15

If you get <0-0> that means you don't have enough resources, CFB demands (at least, depending on codec config and sessions) a WHOLE dsp to work.


A) Add more DSPs

B) Decrease the voice termination channels until you have 16 channels left for CFB. Obviously this means less calls.

Do a sh diag to find out what's onboard



if this helps, please rate

Hythim Ali El Hadad Thu, 10/01/2009 - 07:08


Yes you may have an E1 or FXOs that eat your DSPs

unplug them and check

shutting them down won't affect



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