[nsp] Setting sync on PA-A3-T3

[Neil J. McRae]

> Note that the internal clocking for such a thing is a stratum 
> 3 PLL timer, so plenty good enough for b2b and dark-fiber 
> applications.  If you have no timeslots to fit into in the 
> SONET cloud, it doesn't really matter much how accurate your 
> timesource is; frames go out, frames come in, life goes on. :)
> 

You have to remember that a DS-3 is an emulated PDH service
and clocking does matter, one end should set the clock, 
the other should receive clock from the line. On SDH/SONET
services you should source clock from the line at both ends.

Neil.