[asterisk-users] Timing cable usage necessity
Захаров Антон
instnt at mail.ru
Thu Nov 25 10:23:10 CST 2010
Hello everyone.
I have a timing slips errors and I can't understand what source of the
problem is.
My installation has 2 digium cards: TE420 and TE220 cards in one server.
There are 3 spans (E1) to PSTN and 3 spans to internal PBS stations -
normal installation for transit communication.
Span configuration is:
span=1,1,0,ccs,hdb3 #TE420 - first port. To PSTN.
span=2,0,0,ccs,hdb3 #TE420 - second port. To PBX.
span=3,2,0,ccs,hdb3 #TE420 - third port. To PSTN.
span=4,0,0,ccs,hdb3 #TE420 - fourth port. To PBX.
span=5,3,0,ccs,hdb3 #TE220 - first port. To PSTN.
span=6,0,0,ccs,hdb3 #TE220 - second port. To PBX.
I should to say, that PBXs are interconnected through router (doesn't
know anything about it). So all schema looks like this:
http://yfrog.com/jjschemaj
Spans 1-5 works fine, but on span 6 (marked bold) I have rising timing
slips counter.
I think it's appearing because I'm getting a primary timing source on
span 1 - first port on TE420. But TE220 doesn't use it's span 5 for
timing source, because it has priority 3, so it could be a sync problem.
Am I wrong?
I'm started to think about timing cable for syncing timing on first card
and second. Should I use it?
It's a problem to bought cable in our city (Russia,Moscow). All
resellers sell only cards. Could I use floppy or IDE cable to
interconnect cards? As I see in picture of cable, it's a direct 16 pin
cable.
Does anybody know something about timing cable for different cards? How
I can solve my problem?
Thanks for attention
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