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7 August 2003
Chapter 1 Cisco ONS 15530 Overview
Cisco ONS 15530 Components
1-12
Cisco ONS 15530 Hardware Installation Guide
78-14228-02
CPU Switch Modules
The Cisco ONS 15530 supports two CPU switch modules for redundancy, one in
active mode and the other in hot-standby mode. CPU switch modules are installed
in slot 5 and slot 6. Each CPU switch module has a processor, a switch fabric, a
clock, an Ethernet switch for communication between processors and with the
LRC (line card redundancy controller) on the OADM modules and line cards, and
an SRC (switch card redundancy controller). The active processor controls the
system. All LRCs in the system use the system clock and synchronization signals
from the active processor. Interfaces on the CPU switch modules permit access by
10/100 Ethernet, console terminal, or modem connections.
Figure 1-11 shows the front panel of the CPU switch module.