Installing the I/O Box Assemblies
Each of the three RLPs (RISC-based line processors) in the FRM has two
attached LICs (Line Interface Cards), shown in Figure 2. LIC 1 on each RLP
supports ports 0–3, and LIC 2 supports ports 4–7. Each LIC requires a 4-port
I/O box, as well as a cable from the RLP to the box. (Both are included with the
Frame Relay Module.)
Figure 2 Cards
The RLPs and LAN card are mounted into a bus located between
the two lower cards and the two upper cards. For this reason, RLPs
1 and 2 are upside-down from RLP 1.
The FRM is shipped with a pair of mounting rails that will hold the I/O boxes.
Mount the rails to the cabinet frame, and mount the I/O boxes to the rails, using
the hardware included with the assemblies. See Figure 3. Note that the rails will
hold eight I/O boxes, but no more than six are needed with an FRM.
Ins tal lat ion & Setup Guide
3
Figure 3 I/O Boxes and Cabling
The example in Figure 3 shows how the cabling would appear if the I/O boxes
were associated with, left to right, RLP 0/LIC1 through RLP 2/LIC 2. Cabling
between the FRM and the I/O boxes might appear neater with a different
arrangement; however, the one shown in the figure provides the clearest iden-
tification of the I/O boxes after all cabling is installed.
4
Frame Relay Modul e
RLP 0
LIC 1
LIC 2
RLP 2
LIC 2
LIC 1
RLP 1
LIC 2
LIC 1
LAN Card
I/O Boxes
Interface Cables
RLP Cables
