[Asterisk-Users] Sound Quality

[nathan at yorkukhosting.com]

Hi All,

I've just setup a test Asterisk system that allows incoming/outgoing calls via 
an ISDN card (l4i) and incoming/outgoing calls via SIP (iconnecthere). I have 
two SIP Softphones (Xten X-Lite) for making and receiving calls. 

When receiving an incoming call via the ISDN interface the sound quality is
fine for the Softphone user (i can hear the caller perfectly), but the person 
calling experiences very choppy sound. There are no breaks in the sound, but 
it is very choppy, to the point where a conversation is not possible.

I installed Asterisk from CVS earlier this week. It is running on RedHat 9, 
with a XP1600+ Processor, 384MB RAM. The ISDN card is an 'Elsa Microlink 
ISDN PCI'.

I've searched through the archives but cannot find a resolution to the 
problem. I've tried changing the compression used but this has little or no 
effect. Has anyone got any hints or tips? 

Thanks,
Nathan.