ISDN Interfaces
5-5
Strata CTX I&M September 2002
Figure 5-3 RPTU LEDs and Connectors
Table 5-2 LED Functions
LED Functions
FSYC
Frame Synchronisation
On:Frame alignment is lost.
Off:Frame alignment is working properly.
AIS
Alarm Indication Signal
On:Receiving an alarm from the Exchange.
Off:Circuit is working properly.
RAB
Remote Alarm
On:Receiving a remote alarm from the Exchange.
Off:Circuit is working properly.
LOS
Loss of Signal
On:IC signal cannot be detected.
Off:Circuit is working properly.
RST
Reset
On:CPU is resetting the software.
Off:Circuit is working properly.
BSY
Busy
On:One or more B-channels are busy.
Off:All B-channels are idle.
TS
Timing Signal
On:Circuit is secondary timing source.
Off:Circuit is not used for system timing.
Flashing:Circuit is primary timing source.
Reset Switch
(resets the software)
RS-232C Connector
for Call-Data Monitor (RJ-12)
LEDs
RJ-45 8-pin
(shielded)
Modular Connector (to CSU)
Not Used
FSYC
AIS
RAB
LOS
RST
BSY
TS
2747
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