[Asterisk-Users] timing/clock problem

[Andrew Kohlsmith]

On March 2, 2005 04:49 pm, Alex G Robertson wrote:
> When I configure zaptel with no external clock, E1 gets
> aligned/synchronized with bit rate in 2048000 bps, both me and telco.
> span=4,0,0,ccs,hdb3,crc4

What are the other spans connected to, and what are their span= lines?

> I have another PRI circuit used for data connections from Telco2 and I used
> it for testing.
> Telco2 (Telemar) do not send alarms and I sync to then.

Asterisk cards can only sync to one source per CARD.  So if you have a TE410P 
in there and you're trying to sync to two telcos, it won't work.  Now 
granted, the telcos should all be pretty damn solid for timing and using one 
over the other shouldn't cause frame slips but this is the nature of the 
Digium multiport T1/E1 cards.  You would need to use two cards (at double the 
interrupt rate) or try to convince one telco to sync to you.  I'd be 
surprised if you'll get the latter one to occur.  :-)

-A.