Solved: DSP Requirements

abbas.ali · ‎05-01-2009

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.

Jaime Valencia · ‎05-01-2009

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

HTH

java

if this helps, please rate

View solution in original post

Jaime Valencia · ‎05-01-2009

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

HTH

java

if this helps, please rate

abbas.ali · ‎05-01-2009

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 · ‎05-01-2009

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