Lucent Technologies DDM-2000 OC-12 - Page 160

363-206-295
Transmission and Synchronization Interfaces
Issue 1 December 1997 5-13
Figure 5-6. Synchronization Timing Configurations (Sheet 1 of 2)
OC-12
DS3/OC3/OC3cDS3/OC3/OC3c
DS3/OC3/OC3cDS3/OC3/OC3c
(b) External Timing/Loop-Timing Configuration
BITS Clock
Bank or
Channel
Output
DS1 Timing
RT
(Stratum 3 or better)
Clock Source
CO
TG
Loop-Timed
OC-12
Free-Running
DDM-2000DDM-2000
TG
Small CO or RTCO
(a) Free-Running/Loop-Timing Configuration
TG
Loop-Timed
DDM-2000DDM-2000
TG