Allied Telesis AT-AR020 PRI E1 Installation And Safety Manual page 5

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
J1 Selects ISDN NT mode (installed, test only) or TE mode
(not installed).
J2 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
J1 100Ω termination for TX.
J2 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/ .
5
Default
Not installed.
Installed.
613-000601 Rev A