[Asterisk-Users] Asterisk answers with high pitch sound

[CityTechs.Net]

Hi,

I've googled it and look in voip-info.org <http://voip-info.org> without any 
success. Hope someone can point me to the right direction. I saw a couple 
similar questions, but don't see any answers.

Fedora Core 2
2 X100P(clone) PSTN
Asterisk 1.07

Everything seems to be running fine, but on occasion, Asterisk answers the 
call with high pitch screech sound (like fax or modem connect), it plays the 
normal greeting after a few seconds.

I was getting this with either 1 or 2 X100P card installed. This seems to 
happen when a call ends and another one comes in.

Just a side note, one thing after I installed the 2nd X100P card, the 2nd 
card won't answer unless I turn callprogress=no.

TIA,

John
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