[Asterisk-Users] Zaptel T1 Timing Source

[Don Pobanz]

Waldo Rubinstein wrote:
> These are REAL Telco T1s and not connected to a PBX. Am I to assume  
> that even if they are different providers the timing should be the  
> same? That doesn't make a lot of sense to me.
> 
In general even different providers should have the 'same' timing. Each 
telco should be able to trace their timing back to a stratum 1 clock 
(very accurate clock). Two stratum 1 clocks will look like they are 
timed together even if they aren't. If the telcos can trace their timing 
back to a stratum one clock, you won't have any timing problems with them.

Don Pobanz

Ps. When I first started work at the local telco in the late 80s, we 
derived our timing from one long distance carrier and used this same 
timing for all carriers and customers.