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Voice breakup between 2801 and Nortel Option 11

Hi,

I have a Cisco 2801 connected to a Nortel Option 11c PBX via 2 x isdn bris.

Everything works great apart from voice breakup in 4 out 5 calls.

There is no packet loss, crc or any errors on any interface.

The breakup sounds a bit like VAD but its turned off on the Cisco.

Gain,attentuation and echo cancel are default.

The bris are configured as slave and qsig.

Whats the best method to troubleshoot this?

I've tried the sh voice call and sh voice-port commands and there is nothing noticeable.

Any help much appreciated.

1 REPLY
Silver

Re: Voice breakup between 2801 and Nortel Option 11

you can try these commands also show voice dsp,show call active voice,show voice call summary,show voice port summary

try this link for troubleshooting issues.

http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_troubleshooting_guide_chapter09186a00805585f1.html#wp1039259

http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/prod_troubleshooting_guide_chapter09186a008055851f.html

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