[asterisk-users] timing source problem

[Wolfgang Pichler]

hi all,

we do have some troubles with zaptel timing source - we have a setup
with 3 telco PRI lines, connected to asterisk digium card 0 - asterisk
does some handling - calls are leaving on digium card 1 - going to a
siemens hipath - there is some call handling - some of the calls then
are going from the hipath over a qsig line to a bosch integral PBX -
handling the rest of the calls.

To be able to get away from the bosch system - we like to put asterisk
(1 port free on each card) in the middle of the path siemens -> bosch -
so that it will be siemens -> card 0 asterisk card 1 -> bosch.

Currently the Siemens hipath is playing the network side - the bosch is
cpe. So the siemens hipath does provide the timing source.

With asterisk in the middle i can not take the timing source from the
siemens link - because i have already the telco line as timing source.
But when starting it in this setup - i will get lots of "timing source
auto card 0!" messages. So i think the siemens timing is not in sync.
with the telco timing - so mixed up on asterisk with telco line as
primary timing will not work when the siemens does try to deliver
timing.

I have not tried as /etc/zaptel.conf parameter 0 als timing parameter (0
= be master) - but i think it wont work because the siemens wont accept
the timing from the asterisk box.

Changing configuration of the siemens is not possible.

So - here the questions...
 - is it possible to do what i want to do ?
 - do you think timing=0 in zaptel.conf will work ?
 - would it be possible to connect a xorcom 2 PRI channel bank to
asterisk to handle the qsig line between the two ? Or will the xorcom
then also take the timing from the digum cards - telco lines ? 

any hints would be nice...

many thanks
Wolfgang