Allied Telesis AT-AR020 PRI E1/T1 Hardware Reference Manual page 8

8
Figure 3: AT-AR021(S) BRI-S/T PIC
LEDs
Figure 4: Location of jumpers on the AT-AR021(S) BRI-S/T PIC board
RJ45
Active
D
BRI
J1
ISDN TX ISDN RX
TERMINATION TERMINATION
PIC CONNECTOR
Table 3: AT-AR021(S) BRI-S/T PIC LED functions
LED Function
B1, B2 For on-demand ISDN, lit when there is a call up over the respective B
channel and flashing when data is being exchanged.
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.
Active 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 that the ISDN interface is correctly connected to a working NT
device.
D Lit when HDLC packets are being exchanged between the switch or
router and the ISDN switch over the D (signalling) channel.
Table 4: Functions of jumpers on the AT-AR021(S) BRI-S/T PIC board
Jumper Function
J1 100Ω termination for TX.
J2 100Ω termination for RX.
ISDN BRI S/T port (RJ45 connector)
B1
B2
B1
B2
J2
PIBRI1C
Port Interface Card
Active
D
LEDs
C613-03023-00 REV J
PIBRI1R