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New Member

DSP Sizing problems

Hello,

I have a cisco 2801 gateway with :

- 2 VIC2-2BRI-NT/TE

- 1 VIC-4FXS/DID

- 1 Unity Express AIM

- a need of 3 conferences

I used the DSP Calculator to know the DSP I Need. It asks me to put 1 PVDM2-16 and 1 PVDM2-8.

But, with this configuration, I can't configure any conference ressource (I can only configure maximum session conference to 0).

If I unplug one VIC, then I can configure maximum session conference to 3 in my dspfarm profile.

Is there an error in the DSP Calculator ? or is there a trick I don't know ?

Thanx !

3 REPLIES
Blue

Re: DSP Sizing problems

If you show voice dsp and show dspfarm dsp all are all 24 channels showing? You should only need 8 channels for the voice cards. Are you using G711 only?

New Member

Re: DSP Sizing problems

Well, I noticed that the DSP Calculator gave me a wrong result ...

I have 2 VIC2-2BRI + 1 VIC2-4FXS. So I can have a total of 12 G711 voice calls. So The router use the PVDM2-16 for voice calls.

I still have a PVDM2-8 in my router for conference but I can't use it because I need at least a PVDM2-16 to make conferences ....

So the DSP calculator said me to buy one PVDM2-8 + one PVDM2-16 but it's impossible to do everything (voice calls + conference) with this configuration ...

Thanx for all your help.

Bastien.

Green

Re: DSP Sizing problems

Transcoding and normal voice termination can share the same DSP. Conference needs to use its own dsp firmware, hence it can not share the same dsp with transcoding or normal voice termination.

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