[asterisk-users] Static on calls - v1.8.15.0

[Richard Mudgett]

> I'm testing out a server with asterisk 1.8.15.0 on it.
> I'm experiencing static occurring on almost 90% of calls on this
> particular server.
> All test phones are using SIP, and calls to/from PSTN servers are
> delivered using IAX2.
> 
> 
> I have other production servers running 1.4.x that do not have this
> issue that use the same PSTN connections.
> I haven't seen any ethernet errors or anything like that. Load is
> minimal since this is still a test server.
> The server itself has 16GB of RAM and Dual Quad Core Xeon E5345s.
> 
> 
> I'm sort of baffled as to where to start looking for the root cause
> of this issue, but it appears to be isolated to only this machine.

You might have an A-law/u-law mismatch in the audio path.  That
kind of mismatch sounds like static on the line.

Richard