[Asterisk-Users] Cisco to Cisco - poor quality

[Terence Parker]

I am just starting to deploy asterisk in our office to use as our primary
phone system - we plan to use a Voicetronix OpenLine4 card as our PSTN
gateway - but one thing at a time... haven't got that far yet. Currently,
i'm trying simple IP to IP calls within the office using our Cisco 7960's
phones running SIP.

When I make a call between these two phones, the conversation is of a
quality so bad that it is barely audible (5% makes sense). I recall having
this same problem when I tested asterisk briefly one year ago. However, I
did also try on this occasion to make a call between the cisco phone and
MSN - that worked fine. So it would seem that the cisco phone is to blame?

- but why? Does anyone know why two phones of the same type should have so
much problem talking to each other?

Thanks!

Terence.