[asterisk-users] Where to best start looking for voicemail/moh sound quality problem?

[Frank Tarczynski]

I'm running Asterisk 1.2.13 on a Solaris 10 X86 box behind an IPCop
firewall on a 5Mbps down/512 up cable connection.

I'm having sound quality problems when users call in for voicemail and
with music on hold.  The sound is choppy and muffled while souding pretty
good for calls inside the network.

I'd appreciate some pointers as to where to start looking to improve things.

I've tried setting QOS paramters for IPCop but I'm sure that had any effect.

Frank