Motherboard vs NM DSP

user-cisco · ‎05-21-2007

hi all

if i have PVDM2-xx on 28xx series gateway's motherboard, and a network module (NM-HDV2-1E1) but this module does not have any PVDM2 on it

how can i let the network module take DSP resourses from motherboard DSPs this is cause it needs dsp resources to make voice termination to pstn?

please help

gogasca · ‎05-22-2007

That is called DSP sharing.

To enable DSP sharing, use dspfarm commando in the voice-card configuration.

This example was taken from Voice GWs and GKs book.

2811 ISR with a PVDM2-16 in the mainboard and NM-HDV2 in slot 1. With this configuration, the DSPs on the main board are exported, allowing them to be allocated to voice calls arriving on a T1 or E1 port in the NM-HDV2. The DSPs in the NM-HDV2 are not being exported in this ex.

Router#conf t

Router(config)#network-clock-participate wic 2

Router(config)#network-clock-participate slot 1

Router(config)#voice-card 0

Router(config-voicecard)#dspfarm

Router(config-voicecard)#end

The DSPs on the main board of an ISR are configured under voice-card 0

user-cisco · ‎05-22-2007

I tried dspfarm command under voice-card 0 and made a call from pstn to ip phone, it rings but calling party did not hear ring back and when call was answered there was no audio!!

please help solving this issue

gogasca · ‎05-22-2007

http://www.cisco.com/en/US/partner/tech/tk652/tk698/technologies_tech_note09186a008009484b.shtml#iprouting

http://www.cisco.com/en/US/partner/products/hw/routers/ps259/products_tech_note09186a008031a072.shtml