Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Inbound call no audio

Inbound call no audio

Inbound call no audio


We have a cisco/nortel split setup and we use a cisco router as a wedge from pstn to our cs1000. Outboud calls go through one site and inbound calls go through another site. Inbound pstn calls will have no audio. We did a packet capture and received audio at the switch but it doesnt seem to get back the mgc card dsp.


\this only affects nortel phones. Cisco is working fine.

RE: Inbound call no audio

so you trace the span between the Cisco and the Nortel and you see nothing? Is this PRI where you can turn on messaging to see if the call is getting there? Or do you receive the call and the audio is not there? If the call reaches the Nortel and the audio is not established check the ports on the cisco to see if they are open to send out audio.

Also check the DSP's to make sure they are not disabled. I am assuming here you have IP sets that are having the issue, or is the interface on the Nortel a PRI connection and the set is a digital set?

John Anaya
Amdocs Inc.
ACSS/ACIS - CS1000 Rls 7.5/Call Pilot 5
ACSS/ACIS - SME - IP Office 8.0
APSS/APDS - Avaya UC Services

Public Profile

RE: Inbound call no audio

Our MGC and/or PRI cards in the cs1000 might be failing. After many reboots of the cards, calls started coming through. Very strange. How could one diagnose these cards to see if they are failing? I could ping the PRI cards and the dsp's and the mgc and get a response while the issue was occurring.

RE: Inbound call no audio

Have you maybe go a clashing IP in there somewhere just a thought. Rather than ping during the fault try traceroute and then go to the last router and if its CISCO "show ip arp xxx.xxx.xxx.xxx" check the MAC address is what you are expecting.

RE: Inbound call no audio

That is great advice and we did test that the day we ran into issues. No conflicting IP's.

RE: Inbound call no audio

Patching upto date? We had one way issues down to CSP Loadware in MGC's, VTRK patches in Sig Servers, etc.

RE: Inbound call no audio

Hmmm. Never checked that. I am assuming it is not up to date. Let me look into that. Thanks again.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close