[Asterisk-Users] strange tone is droping calls

[Anton Krall]

Hello Guys!

I have a good one here.

Has anybody had problems with other PBX and their waiting tones, for
example, when you are placed on hold, some old PBX have certain tones
instead of MOH and such.

Well, I have a client that has one of those and everytime I call him,
asterisk drops the calls after listening to 4 of those tones because it
thinks it's a congestion tone.

Can asterisk be fine tuned to avoid drooping a call for those tones? Or is
it too complicated?