[NTISP] Point to Point

Jeff Binkley ( jeff.binkley@asacomp.com )
Tue, 01 Jun 1999 19:22:00 -0500

-> We use mostly Point to Point T-1's. We have been having problems with
-> errors and the lines locking up our DSU's for several months now. We
-> finally had our Attorney call the phone companies involved. One of the
-> phone companies is now saying that with Point to Point connections our DSU's
-> have to set to Master on one end and Slave on the other, and that we keep
-> the Clock Source set to Internal. This is in strong contrast to a month
-> ago, then they claimed the problem was that that our DSU's clock source
-> should be set to Network and that they controlled the clocking.
-> So what gives? Does anyone know which way it is suppose to be with Point to
-> Point's?

If the point-to-point T-1s don't go into a 1/0 ditigal cross connect, then
the phone company probably isn't providing timing. In that case a master/
slave setting is the only way to go. If you are running into their frame
relay cloud then almost always you will be set to slave (i.e. loop timing)
just like your ISDN T-1s.

Jeff Binkley
ASA Network Computing