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4 Port Interface Card
Package Contents
The following items are included with each Port Interface Card (PIC). Contact your
authorised Allied Telesis distributor or reseller if any items are damaged or missing.
■ two spring-loaded retaining thumbscrews
■ two jumpers (AT-AR020 PRI E1/TI and AT-AR021(S) BRI-S/T only).
■ this Installation and Safety Guide
■ one warranty card
Choosing a PIC Bay
Observe the following guidelines when selecting a PIC bay:
■ Use the PIC bays on the switch or router base unit first, before installing PICs
into an AT-AR040 NSM.
■ Fill the PIC bays in an AT-AR040 NSM starting at bay 0.
■ You can install a maximum of two AT-AR020 PRI E1/T1 PICs into an AT-AR040
NSM, and maximum of four total in a switch or router.
■ If two AT-AR020 PICs are installed in an AT-AR040 NSM, PIC one must be
installed in the lower row (bay 0 or 1) and the other PIC must be installed in the
upper row (bay 2 or 3).
■ If an AT-AR020 PIC is installed in an AT-AR040 NSM, and operating in E1 mode,
you can not install an AT-AR021(S) or AT-AR021(U) PIC in the same row of the
NSM.
■ You can install a maximum of four AT-AR027 PICs in an AR745 router fitted with
an AT-AR040 NSM.
■ Avoid installing an AT-AR022 or AT-AR026 PIC in an AT-AR040 NSM.
Performance of these interfaces may be reduced and packet loss may occur.
For instructions on installing an AT-AR040 NSM into your switch or router, see the
Network Service Module Installation and Safety Guide supplied with the NSM. You can
also download this document from www.alliedtelesis.com/support/software.