Allied Telesis AlliedView-EMS 4.0.1 DEVICE MANAGEMENT - Manual (Page 403)

Expansion Gateways
Port Interface Cards
This section describes the Port Interface Cards supported in Device Manager.
If one of these PICs is installed in a PIC bay or in a Network Service Module (NSM) of a
device, it will be displayed in the PIC bay image or NSM image of the device panel in the
main window.
AT-AR020
LED State Description
B DATA Green
Gray
HDLC packets are being exchanged between the switch or router
and another end system device (normally another switch or router)
over any of the B (data) channels.
No packet transmission over B channel.
AT-AR021
LED State Description
B1 and B2 Green
Gray
For permanent circuits, HDLC packets are being exchanged
between the switch or router and another end system device
(normally another switch or router) over any of the B channel. For
on-demand ISDN, there is a call up over the respective B-channel.
No packet/data transmission over B-channel.
AT-AR022 / AT-AR023 / AT-AR024
Note - There are no LEDs on these PICs.
AlliedView™-EMS 4.0.1 Device Management Guide Page 403 of 411