[asterisk-users] beeping during call

[Steve Casto]

Asterisk 1.4.32
dahdi-2.3.0.1
Centos 5.5
Digium TE420
CAC channel bank (2)
Cisco RVS4000 router
Cox 50 Mbps/ 5 Mbps cable modem
Flowroute provider
codac G-711
90 % CPU idle
callwaiting=no

When there are 10-15 or more calls up the farend hears a callwaiting 
like beep every 3 to 6 sec. the duration of this "beep" is very short 
and would be no problem if it didn’t happen every few seconds, some 
callers think they are being recorded. It doesn't mater if the call is 
incoming or outgoing. Call quality is fine.

All calls:
Local User -> channel bank -> TE420 -> Asterisk box -> Cox cable modem 
-> Flowroute

thanks
Steve Casto