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Configuring Cards and Protocols
The circuitry that supports the serial I/O ports resides on
three RLPs (RISC-based line processor cards), and on two
four-port Line Interface Cards (LICs) mounted on each
RLP.
Because the bus runs across the FRM above
the bottom row of cards, RLPs 1 and RLP 2
are installed upside down.
LIC 1 supports ports 0–3, and LIC 2 supports ports 4–7.
The types of serial ports depend on the model. (All four
ports on a LIC are the same.)
An earlier version of the FRM contains one
RLP, providing eight serial ports. This manual
does not document that version, although all
the same functionality can be found in that
FRM except the number of ports. The RLP in
that FRM is also installed upside down.
Chapter 5
LAN 0
LIC 2
RLP 1
LIC 1
Figure 5-1 Line Interface Cards
LIC 1
RLP 0
LIC 2
LIC 2
RLP 2
LIC 1
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