T1 Csu Loopback Connection; Esf T1 Csu Dte Loopback Connection - Lucent Technologies MERLIN LEGEND Release 6.1 Maintenance And Troubleshooting Manual

MERLIN LEGEND Communications System Release 6.1
Maintenance and Troubleshooting 555-661-140
100D Module Problems
Office Repeater
Figure 4-8. 551 T1 CSU Loopback Connection
DTE LOOPBACK
DIAGNOSTIC
INTERFACE
LOCAL
POWER
Figure 4-9. ESF T1 CSU DTE Loopback Connection
SEND CODE
UP UP/DN
FRAME
LOSS
LOW DENS
LOOPED
FAR END LOOPED
551 T1 Channel Service Unit
Signal Monitor Unit
Avg Line
Dens Zeros Pwr Looped BPV
Equipment Central Line
Signal Signal
AOO
Eq
IN OUT
ALARM
NEAR END LOOPED
BPV
CRC ERROR
FRAME LOSS
PULSES
CRITICAL POWER
Issue 1
August 1998
Page 4-104
Pulse
ESF T1 CSU
Eq SM SM
MON MON IN OUT
-1 +1