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Troubleshooting SS7 Interconnect for Voice Gateway

Hi

Recently we have implemeted SS7 Interconnect for Voice Gateway Solution in our network.

We are using devices PGW2200, NAS 5400, SLT 2611, 4000 Series S/w and GK.

Customers compalint that they are facing Echo, Clip in Voice and No voice related issues. Can you tell us the commands on PGW/GW/SLT to pinpoint. PGW we are using in Call Control Mode.

Please help.

Thanks in Advance.

2 REPLIES
Silver

Re: Troubleshooting SS7 Interconnect for Voice Gateway

Here's a nice document on voice related issues. echo could be due to echo cancellors in the gateway not properly placed. A common cause for clipped voice is VAD.

http://www.cisco.com/warp/public/788/voice-qos/symptoms.html

Cisco Employee

Re: Troubleshooting SS7 Interconnect for Voice Gateway

Hi,

You can check in the /opt/CiscoMGC/etc directory properties.dat file which has the parameter *.EchoCanRequired which should be set to 1. This can binded by an individual trunk-group as well. Also make sure the voice-ports have the echo-cancel coverage and disable VAD to see if it makes it better.

Regards

-Kashif

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