ISDN Interfaces
RBUU/RBUS Interface Unit
5-26 Strata CTX I&M 10/02
Figure 5-23 Location of LEDs and Connectors (RBUU/RBUS)
Table 5-8 RBUU/RBUS LED Indications
LED Definition LED Off LED On LED Blinking
BSY Busy Port is in idle. Port is busy. Port is in test mode.
TS
Time
Synchronization
Not CLK extraction port.
Secondary CLK
extraction port.
Extracting CLK port.
PSI
1
1. PSI is labeled LOS on Beta PCBs
Port Status
Indicator
Port is in LT mode. Port is in NT mode.
AIB is received by this
port.
FS
Frame
Synchronization
Frame alignment is
established.
Frame Alignment error.
Port is trying to establish
frame alignment.
RBUU1A
RS-232C
Monitor Output
4776
RBUS1A
RJ45 Modular
for Circuit 3
RJ45 Modular
for Circuit 4
RJ45 Modular
for Circuit 1
RJ45 Modular
for Circuit 2
LED Indicators
for Circuit 1
LED Indicators
for Circuit 2
LED Indicators
for Circuit 3
LED Indicators
for Circuit 4
BSY
T S
PSI
F S
BSY
T S
PSI
F S
BSY
T S
PSI
F S
BSY
T S
PSI
F S
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