DSP Requirements

Answered Question
May 1st, 2009

I have a Cisco 2811 Routers installed in 15 remote locations with (2) PVDM2-16 Chips.


Each router has (1) Four Port FXO for PSTN Calls, and (1) 4-port FXS Card for FAX and Paging Connectivity.


I calculated that (2) PVDM2-16 would be plenty. (1) PVDM2-16 can support FXO/FXS Card, and the other one I calculated to support AD-HOC/Meet Me and Meeting Place Express Calls.


On-Net Calls will be IP-IP and will not require any DSP Resources.


Just need some feedback to make sure that above configuration will work fine.

Correct Answer by Jaime Valencia about 7 years 10 months ago

that's correct 8 channels from 1 DSP for analog ports and the other whole DSP for conference


HTH


java


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Correct Answer
Jaime Valencia Fri, 05/01/2009 - 12:31

that's correct 8 channels from 1 DSP for analog ports and the other whole DSP for conference


HTH


java


if this helps, please rate

abbas.ali Fri, 05/01/2009 - 12:41

Thank you so much for your quick response. I knew that DSP can not be shared between voice ports and conferencing that is why I decided to go with (2) DSP per routers. One for FXO/FXS Cards, and the other one between Adhoc/Meet Me and dedicated Meeting Place Conferencing Server.


Regards,


Tommer Catlin Fri, 05/01/2009 - 15:10

i found this in the forum to help me and keep it in my notes:


DSPs cannot be shared between voice ports and conference bridges, they can be shared between voice ports and transcoders.

Keep in mind though that 1 DSP consists of 16 PVDM channels, so 16 DSPs will theoretically provide 16x16 G711 voice calls, is that not enough for you?

Each DSP can provide 8 G711 conference bridges or 2 mixed codec conference bridges, with up to 8 participants in each session.


AFAIK 1 DSP = 4 channels


If you are using a T1 then is 24 channels hence you need 6 DSP's



8 bridges with 8 particpants x 4 = 4 DSP chip


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