No ringback and no-way audio

d.hillman · ‎06-11-2009

CM 6 with MGCP gateway with two PRIs. Calls get completed but no ringback and no audio.

network-clock-participate wic 0

network-clock-participate wic 1

network-clock-select 1 T1 0/0/0

network-clock-select 2 T1 0/1/0

isdn switch-type primary-ni

voice call send-alert

voice rtp send-recv

voice-card 0

dspfarm

dsp services dspfarm

interface Serial0/0/0:23

no ip address

encapsulation hdlc

isdn switch-type primary-ni

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

kifleak19 · ‎06-12-2009

Hi,

Add the following under dial-peer pots:

progress_ind setup enable 3

progress_ind alert enable 8

progress_ind progress enable 8

dezoconnor · ‎06-12-2009

No need to add the above config as you're using mgcp not h323. Anyway, is there a firewall involved in this setup at all? You could be dropping RTP packets (udp ports 16384-32xxx, sorry can't remember them off the top of my head). Either that or a routing issue. Can you Ping any of your ip phones from your voice gateway?

d.hillman · ‎06-12-2009

Connectivity is fine and no packet loss.

Nicholas Matthews · ‎06-12-2009

Try this:

mgcp behavior g729-variants static-pt

mgcp behavior dynamically-change-codec-pt disable

I think you may be hitting this issue:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsy10653

hth,

nick