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T1
T1
RDTU3 - T1 Interface Unit
Strata CTX I&M 06/04 8-3
For more detailed information on these alarms, refer to Table 8-6 on page 8-8.
Table 8-2 RDTU3 LED Functions
RDTU3 LEDs Indication
FSYNC
Frame Sync error indication
On = No frame synchronization status
Off = Frame synchronization status
MFSYNC
Multi-frame Sync error indication (same with FSYNC)
On = No frame synchronization status
Off = Frame synchronization status
BALM/AIS
Blue Alarm indication
On = RDTU3A is receiving Blue Alarm
Off = RDTU3A is not receiving Blue Alarm
YALM/RAI
Yellow Alarm indication
On = RDTU3A is receiving Yellow Alarm
Off = RDTU3A is not receiving Yellow Alarm
LOS
Signaling Loss indication
On = RDTU3A is not receiving T1 signals
Off = RDTU3A is receiving T1 signals
BSY
Busy state indication
On = One or more RDTU channels are in use
Or RDTU is not receiving T1 signals
Off = No RDTU channel is in use
Flashing = RDTU is in Remote Loop Back mode
PSYNC
Primary synchronization indication
On = RDTU is assigned as the primary timing PCB
Off = RDTU is not assigned as the primary timing PCB
Flashing = RDTU is extracting T1 CLK
SSYNC
Secondary synchronization indication
On = RDTU is assigned as the secondary timing PCB
Off = RDTU is not assigned as the secondary timing PCB
Flashing = RDTU is extracting T1 CLK