Specifications

10 Port Interface Card

C613-03023-00 REV P

AT-AR021(U) BRI-U PIC

The AT-AR021(U) BRI-U PIC provides a single Basic Rate ISDN U Interface

WAN port. The BRI port has an RJ-45 connector.

The front panel of the AT-AR021(U) PIC is shown in Figure 5, and the functions

of the LEDs are listed in Table 6.

Figure 5: AT-AR021(U) BRI-U PIC

There are no user-configurable jumpers on the AT-AR021(U) BRI-U PIC.

Warning Do not attempt to install or remove the PIC while the switch or router

is connected to a power supply or a live network. Disconnect the mains power

supply, any redundant power supply, and any cable attached to the WAN port

of the PIC. Dangerous voltages may be present on some parts of the PIC board,

even if the switch or router is powered off.

Table 6: AT-AR021(U) BRI-U PIC LED functions

LED Function

B1, B2 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.

For ISDN, lit when there is a call up over the respective B channel and

flashing when data is being exchanged.

Active Lit when the U interface is in the Activated state (i.e., it is fully operational

at layer 1).

D Lit when HDLC packets are being exchanged between the switch or

router and the ISDN switch over the D (signalling) channel.

AR021UFP

Active

LEDs

ISDN BRI U interface (RJ45 connector)

BRI U