[Asterisk-Users] Klicking sounds in background

[Jochen Witte]

Hello,

I have an IVR with Intel HMP SIP stack, which is a peer behind my Asterisk
box (Asterisk 1.0.7, Digium PRI). When dialing in via PSTN, there are
klicking sounds in the background, which do not appear, when dialing in via
SIP (using Asterisk as pbx). The issue does not seem to be an alaw/µlaw
problem. 

I tried trunking two Asterisk boxes via IAX and then call via two asterisks,
but the same effect appears. Whenever there is PSTN involved, I have these
klicking sounds, when there is no PSTN, everything works correctly. 

The setup works great with different SIP peers (others than the Intel...)

Anyone has an idea?

Best regards
Jochen

--
Jochen Witte
email: jwitte at alpha-lab.net
web: http://alpha-lab.net