Phones Ring but NO VOICE - complete silence

Unanswered Question
Jun 28th, 2009
User Badges:

My current setup is as follows

PBX to VOIP routers - WAN - VOIP router to PBX

Calls are getting connected and the phone rings at either site, when someone picks the phone up there is just silence.

any suggestions?

Thanks in advance for any help

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
gogasca Sun, 06/28/2009 - 16:17
User Badges:
  • Green, 3000 points or more

can u check the routing any acl, firewall,...?

pgcristovam Sun, 06/28/2009 - 16:24
User Badges:


Yes, look the routing rules (acl, firewall...) all that can to block the rtp.

The RTP and signaling protocol, use differente ports.



freenesss Mon, 06/29/2009 - 00:48
User Badges:

There is full routing between the 2 routers accross the WAN, there are also no firewalls in place or ACL's on any router interfaces.

is there anything else i should be looking at, or any other possible causes to this problem?

pgcristovam Mon, 06/29/2009 - 04:49
User Badges:

Send us the configuration both routers.

What is the codec utilized?

pgcristovam Mon, 06/29/2009 - 05:48
User Badges:

Try to create a voice class codec


(config)#voice class codec 1

(config-xx)#codec preference 1 g729r8

(config-xx)#codec preference 2 g729br8

On both routers and apply this voice class on dial-peer voip


dial-peer voice x voip

voice-class codec 1

So, on dial-peer voip put the command:

incoming call .T


dial-peer voice x voip

incoming call .T




This Discussion