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Installation and Safety Guide

7. Unpack the PIC.

In an antistatic environment, remove the PIC from its packing material. Be sure

to observe ESD precautions.

Warning Do not attempt to install a PIC or any other expansion option without

observing correct antistatic procedures. Failure to do so may damage the switch

or router, PIC, or expansion option. If you are unsure what the correct

procedures are, contact your authorised Allied Telesis distributor or reseller.

8. If the PIC has jumpers, check they are correctly set.

Warning Do not attempt to change any jumpers, DIP switches, or other

hardware configurations while the switch or router is connected to a power

supply, redundant power supply, or a 'live' network. Dangerous voltages may be

present on some parts of the board, even if the switch or router is not turned on.

AT-AR020 PRI E1/T1 and AT-AR021(S) BRI-S/T PICs have user-configurable

jumpers. Check all jumpers and other hardware configurations are set correctly

on the new PIC (see Table 1 and Table 2).

AT-AR026 4ETH PICs have user-configurable links that set features such as auto-

negotiation, buffer size, and MAC address aging. Descriptions of the links can be

found in the PIC Hardware Reference.

Table 1: Functions of jumpers on the AT-AR020 PRI E1/T1 PIC board

Jumper

Function

Selects ISDN NT mode (installed, test only) or TE mode

(not installed).

Selects T1 mode (installed) or E1 mode (not installed).

Earlier versions of the AT-AR020 PIC also have a J3 interface jumper. If present,

this jumper must be installed for E1 mode and removed for T1 mode.

Table 2: Functions of jumpers on the AT-AR021(S) BRI S/T PIC board

Jumper

Function

100Ω termination for TX.

100Ω termination for RX.

For more information on PIC jumpers and hardware configurations, see the Port

Interface Card Hardware Reference. This Reference can be found on the CD-ROM

bundled with recently purchased switches or routers, or can be downloaded

from

www.alliedtelesis.co.uk/site/products/ .

Default

Not installed.

Installed.

613-000601 Rev A