Allied Telesis Rapier 16F-FX Installationsanleitung PDF herunterladen (Seite 9)

Quick Install Guide 9

C613-04019-01 REV F

AT-AR041 and AT-AR042.

AT-AR048

The AT-AR048 NSM has the following LEDs on its face-plate.

Table 1: AT-AR041 and AT-AR042 LEDs.

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 There is no connection to the ISDN, or the ISDN

has deactivated the connection

Data Amber For on-demand ISDN, lit when there is a call up

over the respective B channel

For permanent circuits, lit when HDLC packets

are being exchanged between the switch or

router and another TE end system device

(normally another switch or router) over the

respective B (data) channel

Flashing Amber For on-demand ISDN, flashing when data is

being exchanged

Off For on-demand ISDN, Off when there is no

active connection or when continuous data

exchange is occurring

For permanent ISDN circuits, Off when no data

exchange is occurring

Table 2: AT-AR048 LEDs.

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

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Allied Telesis Rapier 16F-FX Installationsanleitung Seite 9