40
Rapier Series Switch
C613-03020-00 REV K
NSM LEDs
NSMs are expansion options and must be purchased separately. They can be
used with all Rapier models except the Rapier 48, Rapier 48
i
, G6, G6F/SX,
G6F/LX, and G6F/MT.
The AT-AR040 NSM unit has no independent LEDs. See
Table 11 on page 34
for
information about related LEDs found on the base-unit switch or router.
The LEDs in
Table 22
are located on the face-plates of AT-AR041 and AT-AR042
NSMs.
The LEDs in
Table 23
are located on the face-plate of AT-AR048 NSMs.
Table 22: LEDs on the AT-AR041 and AT-AR042 NSMs
LED
State
Function
Active
Green
Lit when the BRI has successfully completed
the exchange of INFO 1 and INFO 2 signals,
and INFO 3 and INFO 4 signals are present on
the link. This means the ISDN interface is
correctly connected to a working NT device.
Off
No BRI activity is occurring.
Data
Amber
Pulses when HDLC packets are being
exchanged between the switch or router and
the ISDN switch over the B and D channels.
Off
No data exchange is occurring.
Table 23: LEDs on the AT-AR048 NSM
LED
State
Function
Active
Green
Lit when the Line Interface Unit (LIU) is
receiving a signal
Loop
Green
Lit when any loopback is active
LOS
Amber
Lit when the received signal is lost. This usually
indicates a network disruption, such as a cable
being disconnected or a device failure
LOF
Amber
Lit when the DS3 framer cannot extract valid
frames from the received signal
AIS
Amber
Lit when an Alarm Indication Signal is detected
FERF
Amber
Lit when a Far End Receive Failure signal is
detected. This indicates the far end is receiving
an AIS, LOS, or LOF signal
