[Asterisk-Users] Two zaptel T1 cards: no clock from one

[Rich Adamson]

> Yeah, proper crossover cable.  I've eliminated all cabling issues with
> the T1 analyzer.  I get a full and accurate pattern back when I test
> from the cable end where it would have been connected into the T100P,
> with the channel bank in loopback.  The main symptom is that when I
> hook the analyzer directly to either the channel bank or the T100P,
> neither is providing clock.  I could have the channel bank supply one,
> but I will have fax/modem calls bridged between the two PCI cards, so
> a common clock is best.  The most disturbing thing is that the T100P,
> as the only card in a system, provided clock just fine.
> 
> There was a thread last month in -dev about being unable to use common
> clock source across cards.  Is this related?  How can one cause zaptel
> to provide ref clock?  Should I be seeing 1000 interrupts/sec on any
> and all TDM cards?

Help me understand what you mean by "neither is providing clock".

By definition, every single T1 provides clocking within the transmit
side of a T1. Its embedded in the data stream and you can't turn it off.

Are you talking about clock "sync"?