363-206-285
Transmission and Synchronization Interfaces
Issue 3 June 2001
5-59
OC-3 SONET network. Multiplexed DS1 reference transport is also consistent
with current planning and administration methods. Applications include passing
synchronization from the public switched network to a PBX-based private network
(Figure 5-29) and synchronizing an end-office remote switch to a larger office's
host switch.
Figure 5-29. Timing from Multiplexed DS1
DDM-2000
DS1
Customer
Network
RT
PBX
External Clock
Stratum 3 or
DDM-2000
Better
DS1
CO
DS1
DS1 Carrying Data
and Used as a
Timing Reference
OC-N
tpa 814268/01
TG
TG
May be a TG3 if the CO is a TG3.
*
*
To Next Page
Loading...
Need help?
General
