Cisco GS7000 Installation And Operation Manual page 30

Chapter 1 General Information
Module
Reverse
Configuration
10
Description
There are several types of this module.
The 4x1 Reverse Configuration Module (RCM) with auxiliary
reverse RF injection combines all four reverse RF inputs (Ports 1, 2/3,
4, and 5/6) of the node and routes the signal to Transmitter 1. An RF
signal from an external source can optionally be injected and coupled
with the reverse RF inputs on Ports 3/6 and routed to Transmitter 1.
The 4x1 Redundant Reverse Configuration Module combines all four
reverse RF signals (Ports 1, 2/3, 4 and 5/6) together, splits this RF
signal and routes it to Transmitters 1 and 2.
The 4x2 Reverse Configuration Module with auxiliary reverse RF
injection combines reverse inputs from Ports 1 and 2/3 and routes
them to Transmitter 1; it also combines reverse inputs from Ports 4
and 5/6 and routes them to Transmitter 3. An RF signal from an
external source can optionally be injected and coupled with reverse RF
inputs from Ports 3/6 and routed to Transmitter 1.
The 4x2 Redundant Reverse Configuration Module combines reverse
inputs from Ports 1 and 2/3 and routes them to Transmitters 1 and 2;
it also combines reverse inputs from Ports 4 and 5/6 and routes them
to Transmitters 3 and 4.
The 4x3 Reverse Configuration Module with auxiliary reverse RF
injection is available in two types. The
left-combined/right-segmented version combines reverse inputs from
Ports 1 and 2/3 and routes them to Transmitter 1; it also routes reverse
inputs from Port 4 to Transmitter 3 and from Ports 5/6 to Transmitter
4. An RF signal from an external source can optionally be injected at
Ports 3/6 and coupled with the reverse RF input from Port 1 and
routed to Transmitter 1. The left-segmented/right-combined version
combines reverse inputs from Ports 4 and 5/6 and routes them to
Transmitter 4; it also routes reverse inputs from Port 1 to Transmitter 1
and from Ports 2/3 to Transmitter 2. An RF signal from an external
source can optionally be injected at Ports 3/6 and coupled with the
reverse RF inputs from Ports 2/3 and 1 and routed to Transmitter 1.