[asterisk-users] timing source problem

[Tzafrir Cohen]

On Fri, Apr 24, 2009 at 12:09:50PM +0200, Wolfgang Pichler wrote:
> 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 ? 

I missed the part about Xorcom initially and I see nobody answered it
yet.

Yes, a Xorcom PRI module should be able to take fit here and get timing
from the main Zaptel / DAHDI timing source on the system.

IIRC, though (some? all?) Digium digital cards have a sync cable option
which may be what you need here.

-- 
               Tzafrir Cohen
icq#16849755              jabber:tzafrir.cohen at xorcom.com
+972-50-7952406           mailto:tzafrir.cohen at xorcom.com
http://www.xorcom.com  iax:guest at local.xorcom.com/tzafrir