[asterisk-users] Problems with overlap dial and Xorcom Astribank BRI

[Lars Bensmann]

I have a strange problem with overlap dialing. I installed an asterisk
server between a Siemens HiCom PBX and our telephony provider.

Everything is working fine except some strange problems with the dialing
of the fax (connected to the HiCom PBX). It seems to me that if dialing
takes too long Asterisk just hangs up the channel without recognizing
that the fax machine is still dialing:

(Fax gets HiCom dialton)
(Fax dials 0 to get Asterisk dialtone)
-- Accepting overlap voice call from 'xxxxxxx' to '<unspecified>' on channel 0/2, span 8
-- Starting simple switch on 'Zap/23-1'
(Fax starts dialing...)
-- Hungup 'Zap/23-1'
(Fax still dialing)

The time between 'Starting...' and 'Hungup' is about 5 secs. If the
number is dialed in this interval everything is fine.

The phones (also connected to the HiCom PBX) also use overlapdialing,
but there I can dial as slow as I want as long as I press a digit every
5 secs. (But the phones are not connected to an analog line like the fax
is.)

I thought that I could fix this with a DigitTimeout of 10 secs. But this
does not work and interestingly it does not affect the time when
Asterisk hangs up on the fax. This time is still 5 secs. But I can see
in the logs that the digit timeout was modified and it affects the
timeout for dialing from the phones.

How can I fix this behaviour? I'm using the Asterisk package
1:1.2.19~dfsg-0.4227 from the Xorcom debian repository.

Thanks,
Lars

-- 
Life would be so much easier if we could just look at the source code.