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7 August 2003
1-17
Cisco ONS 15530 Hardware Installation Guide
78-14228-02
Chapter 1 Cisco ONS 15530 Overview
Cisco ONS 15530 Components
OSC Modules and Carrier Motherboards
The OSC (optical supervisory channel) module supports an optional out-of-band
management channel for communicating between systems on the network. Using
a 33rd wavelength (channel 0), the OSC allows control and management traffic to
be carried without requiring a separate Ethernet connection to each Cisco ONS
15530 in the network. Up to two OSC modules can be installed in the carrier
motherboard, one module for the west direction and one for the east direction.
The OSC always terminates on a neighboring node. By contrast, data channels
may or may not be terminated on a given node, depending on whether the channels
on the OADM modules are treated as either express (pass-through) or add/drop
channels.
Figure 1-12 shows the front panel of the OSC module.
Figure 1-12 OSC Module
Callout Description Callout Description
1 Card status LED 4 Transmit LED
2 OADM port 5 Card handle
3 Receive LED
STATUS
TX
RX
77667
T
X
R
X
15530-OSCM
1
3
5
4
2