I have recently remove attenuation levels on my customers voice gateways because external callers were complaining that the users on the ip phones sounded too quiet. This problem is no longer a problem (and thankfully no echo appears to have been introduced). However, some users are complaining that when the pick up voice messages from external callers, they can sound crackly. One option is that I re-introduce some attenuation at the gateways and tweak until I get a happy medium. However, I was wondering if there is some other solution to the crackly voice mail problem. Here are the system details:
Are you using 6608 gateway? We upgraded to CM 3.14b spC to resolve Unity VM issue termed 'Mr. Roboto' in the release notes. Basically we were getting choppy voice mails every so often. Problem seems to be resolved now. We also bumped default delay settings:
I used to have a comparable system (CCM 3.1, Unity 220.127.116.11), and had the same crackly poppy sounding messages. I fixed it by adjusting the recording db. The following link tells you how to adjust the registry in 2.4.6
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
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CUCM Database Replication is an area in which Cisco customers and
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