[cisco-voip] HW Based Conferencing Bridge with 2xPVDM2-64

[Jaquish, Bret]

On the PVDM2 models of DSPs, conferencing reserves an entire DSP.  I thought that the new PVDM3 modules with the new ISR G2 routers overcome this limitation.

Q. Can conferencing share the resources with transcoding or voice calls of a single DSP?
A. No. Conferencing needs a dedicated DSP resource. If a DSP is assigned for a conferencing session, then it cannot be used for transcoding or voice call initiations or terminations. Transcoding and voice calls can share the resource of a single DSP, however. Note that conferencing needs a dedicated DSP, but not a dedicated PVDM2 module. For example, PVDM2-64 contains 4 DSPs; if one of them is used for conferencing, the other three can still be used for other purposes.

http://www.cisco.com/en/US/prod/collateral/modules/ps3115/ps6024/prod_qas0900aecd8016c6ad_ps5855_Products_Q_and_A_Item.html

Bret
From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Syed Khalid Ali
Sent: Wednesday, May 12, 2010 2:52 PM
To: Ed Leatherman
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] HW Based Conferencing Bridge with 2xPVDM2-64

yes I tried the DSP calculator and for 16 conferencing session, a PVDM64 and PVDM32 is required.

But I am confused, the same DSPs can be used for both Voice Termination and Conferencing.
On Thu, May 13, 2010 at 12:11 AM, Ed Leatherman <ealeatherman at gmail.com<mailto:ealeatherman at gmail.com>> wrote:
Syed,

Have you tried the online DSP calculator at:
http://www.cisco.com/cgi-bin/Support/DSP/dsp-calc.pl



On Wed, May 12, 2010 at 3:05 PM, Syed Khalid Ali
<syed.khalid.khursheed at gmail.com<mailto:syed.khalid.khursheed at gmail.com>> wrote:
> Group:
> I need some suggestion.
> Currently we are running CCM 4.2. We have around 30+ site with 5 to 10
> phones. To save bandwidth and limitation, regions and location have been
> implemented. G.729 is used for inter-site calls and G.711 for intra-site
> calls. Currently the voice gateway is placed at head office with two E1s and
> 12 FXOs. The issue is  conferencing with inter-site calls due to G.729.
> There are 2 PVDM64 installed. 60 are consumed by E1s and 12 by FXOs total of
> 72. I still have (128-72) 76 channels. Is the rest of channels can be used
> for hardware based conferencing. And how many session will be available.
> Can any one provide a good resource for doing this math?
> Also since we don't have voice mail. I guess there is no need for
> transcoding.
> --
> Thanks,
> Syed Khalid Ali
>
>
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>



--
Ed Leatherman



--
Thanks,
Syed Khalid Ali

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