help on DSP and voice termination

Unanswered Question
Jun 27th, 2007
User Badges:


I don't understand why it's necessary to allocate DSP ressource to voice termination.

normally all the voice port module (FXS, FXO, VWIC-E1, VWIC-T1) have a built in DSP. so why do we need to allocate extra DSP ressource to that.

when human voice comes in the interface, it's handle by the DSP of that interface.

I understand why DSP is used for transcoding and conferencing.

thanks for your help

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
paolo bevilacqua Wed, 06/27/2007 - 08:46
User Badges:
  • Super Gold, 25000 points or more
  • Hall of Fame,

    Founding Member


There are no DSP on the interfaces you mentioned. The DSPs are either on the network module (older technology), or directly on the router mainboard as PVDM2 module (newer ISR routers).

Hope this helps, please rate post if it does!


This Discussion