[Asterisk-Users] Channel bank timing

[Rich Adamson]

> > I don't believe the above config is correct.
> 
> It should have been fine.
> 
> > Both channel banks will be generating timing/clock signals within their
> > transmit leg towards the asterisk box. That is part of T1/E1 low level
> > protocol design and you can't change it even if you wanted to.
> 
> Yes, but both channel banks can sync to the line, and the Sangoma card can be 
> set to not sync to the line, thus becoming the master on both spans.
> 
> > On the asterisk T1 port connected to CB2, use:
> >  span=2,2,0,esf,b8zs
> > where the second "2" tells your asterisk T1 card to use this port for
> > sync "if" the first port does dead, fails, cable is disconnected, or for
> > any other reason that would essentially represent a failure of CB1.
> 
> There are two problems with this:  1. the A104 can have each span's sync 
> independent of the others, unlike the Digium cards.  2. With both spans 
> trying to sync to each other you can run into interesting clock situations 
> you may want to avoid.

Ops, wasn't aware each span had independent clock/syncing. Sorry.