[asterisk-dev] M9645: provide zaptel master timing to spans

[Tzafrir Cohen]

On Wed, May 02, 2007 at 10:21:14AM -0400, Andrew Kohlsmith wrote:
> On Wednesday 02 May 2007 10:01 am, Tzafrir Cohen wrote:
> > What do you think about such an interface? Useful?
> > Now that I think about it, that code is called near the end of the
> > relevant part of zt_recieve . Calling it a bit earlier may have given
> > the called spans a slightly cleaner spans (e.g: independent on the
> > number of pseudo channels).
> 
> I'd written about this a few years ago, wherein you had multiple cards in a 
> system and only the first detected card would have its physical interrupt 
> unmasked.  Essentially you could put four quadspan cards in and have a single 
> 1ms interrupt service all spans.
> 
> What do you think of expanding the patch to disable interrupts on subsequent 
> cards?

That approach helps for multiple cards that are driven by the same
driver. What about a system with two different card types?

Also consider an mISDN card providing timing through the ztdummy
external timing patch:
http://bugs.digium.com/view.php?id=8896

-- 
               Tzafrir Cohen       
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