Lucent Technologies DDM-2000 OC-3 - Page 1185

TEST-TRMSN-T1 5of3Page TEST-TRMSN-T1
Loopback
Demultiplexing Direction
Internal Loopback
FAR END
OLIU
Multiplexing Direction
OLIU
NEAR END
Fiber
Internal test signal
Multiplexing Direction
Loopback can be
Demultiplexing Direction
fiber loopback, internal loopback
Monitor
External
Loopback
External
Loopback
DSX/T1
DSX/T1
DSX or T1
Carrier
DSX or
T1 Carrier
DSX, or T1 Carrier external loopback
DirectionDEMUXinSignalDS1ofTestTransmissionAutomated11-14.Figure
OC-3DDM-2000 2000February2Issue 11-515