[asterisk-dev] Alternative Clock Source

[Paulo Garcia]

Hi All,

After some research I decided to patch the ztdummy to provide the clock
source for Asterisk.

Now, I'm wondering with a scenario where I have my card and another vendor
card (e.g. Digium or Sangoma). How the clock will work in this situation?
The true-zaptel-card (Digium or Sangoma) will "overwrite" my patched ztdummy
and use its own clock? Is there a way to my clock have high priority in this
case?


Thanks in advance!


Paulo Garcia










On 6/11/07, Michael Cargile <mcargile at explido.us> wrote:
>
> > Also, I need to clarify what do you mean when said "to provide
> > channels". Could you please?
>
> What I mean by providing channels it that zaptel hardware not only
> provided a timing source to Asterisk but also a channel driver for tdm
> devices such as FXO ports and T1 cards. We are planning on being able to
> specify in the host operating system which virtual machine to pass spans
> to. That way we can divide an eight port T1 card up amongst 4 Asterisk
> instances. We plan on doing this in a similar fassion as Zaptel over
> Ethernet. Technically you could do this anyways by running an Asterisk
> instance in the host and the VMs, then use ZOE between them, but that
> basically defeats the idea of running Asteirsk in a VM which is to
> seperate instances from each other. Plus you would not get the timing
> benifits from the physical zaptel device in the VMs.
>
> So anyways I am of the opinion that if the device you are using to get
> your timing is able to place a phone call to the PSTN in some fassion
> you should create your own zaptel driver. If not just create a patch to
> ztdummy.
>
> Michael Cargile
> Explido Software USA Inc.
> www.explido.us
>
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-- 
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Paulo Garcia
Pika Technologies Inc
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