Allied Telesis AT-AR027VOLP-FXS, AT-AR020 PRI EI/TI, AT-AR021 (S)BRI-S/I Jumper Function Default

6 Port Interface Card

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 turned off.

AT-AR020 PRI E1/T1 and AT-AR021(S) BRI-S/T PICs have user-configurable jumpers. Check all jumpers are set correctly on the new PIC, as shown in Table 1 and Table 2. Early 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. The AT-AR021(S) V2 hardware revision, identified by the label “AR021 V2” on the board, supports both TE and NT mode. Jumper J4, when installed, selects NT mode. The PIC should be configured as a TE for normal operation.

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

Jumper	Function	Default
J1	ISDN NT mode (installed, test only) or	Not installed.
	TE mode (not installed).
J2	T1 mode (installed) or E1 mode (not installed).	Installed.
J3	E1 mode (installed) or T1 mode (not installed).	-
	Only present on earlier versions of the PIC.
Table 2: Functions of jumpers on the AT-AR021(S) BRI S/T PIC board
Jumper	Function	Default
J1	100Ω termination for TX.	Not installed.
J2	100Ω termination for RX.	Not installed.
J4	ISDN NT mode (installed) or TE mode (not	Not installed.
	installed). Only present on V2 hardware revision
	of PIC.