Troubleshooting SS7 Interconnect for Voice Gateway

[corliantindia]

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.

[owillins]

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

[kzeeshan]

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