[asterisk-users] TDMOE Timing

[Steve Totaro]

On Thu, Feb 19, 2009 at 5:00 PM, Dave Fullerton <
dfullertasterisk at shorelinecontainer.com> wrote:

> Hello all,
>
> I have two machines I'm connecting with TDMOE (dahdi dynamic spans) and
> I have a question about timing parameters. By my understanding one
> machine should be the source of the timing and the other a slave of that
> timing.
>
> So on machine A I have the following in system.conf:
> dynamic=eth,eth0/00:0C:29:55:89:7E,24,0
>
> On machine B I have this is system.conf:
> dynamic=eth,eth0/00:18:8B:C7:F6:94,24,1
>
> So machine A is the source of timing and B is slave to it. If both of
> these machines also have a digium (TDM400P in one and a TE110P in the
> other) card in them is this configuration still correct or should I use
> 0 for timing on both?
>
> The reason I ask is if I boot both machines fresh and I execute
> dahdi_cfg on machine A first and then machine B I either get a kernel
> oops (with 2.6.27.11) or complete freeze (with 2.6.23.17) on machine B
> pretty much without fail. If I do machine B first and then A everything
> works fine. I'm using dahdi_linux 2.1.0.4 on both.
>
> I know I can just use SIP or IAX or anything else to connect these two
> machines, but I'm using this as a learning experience to play with PRI
> setups.
>
> Thanks
>
> -Dave
>
>
I cannot speak about DAHDI but I can tell you that the timing provided by
the card is different than the timing of a PRI Span.

I suspect that DAHDI has a bug in TDMoE  because the spans should either not
come up but Asterisk should run and the Kernel should not bomb out, at least
I have never seen this with Zaptel.

If nobody answers your question with a real answer, I suggest opening a bug
report.

-- 
Thanks,
Steve Totaro
+18887771888 (Toll Free)
+12409381212 (Cell)
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