[Asterisk-Users] Nasty little incident ...

[Rich Adamson]

> > Just a wild guess....
> > 
> > When the two meridian links disappeared, the channel numbers
> > probably changed. Instead of channels 1 through 124, you probably
> > have channels 1 through 62 and your supporting dialplan (and other
> > channel specific items) likely don't match.
> 
> No - just because the span goes doesn't mean its gone.  Its simply there 
> and down.
> 
> Here's my theory as to the problem:  In the config, Spans 1 and 3 are to 
> the telco, 2 and 4 to the old pbx.  Clocking is being taken from spans 1 
> and 3.
> 
> Now the symptom when the meridian was disconnected was like zaptel had no 
> clock.  
> 
> So theory one is that the spans are actually plugged into the board 
> "upside down", with telco on 4 and 2, meridian on 3 and 1.  so when the 
> meridian was disconnected there was no more clock.
> 
> Second theory is that the zaptel.conf was changed - maybe moving which 
> spans clock comes from - and the zaptel modules weren't reloaded or ztcfg 
> wasn't run.
> 
> Port 1 on the TE410P is at the "top" (away from the mobo), btw.

The E1 card does not receive "clocking" from any span. It "sync's"
the on-board clock to whatever span you choose. If you watch what
others have posted on the list over many months, you'll notice many
have never specified a clock sync source. The problem they have is
typically associated with clicking and other audio distortion; not
a total failure.

So, highly unlikely to have anything to do with clock sync.