Cisco ONS 15200 - Manual (Page 18)

1-2
Cisco ONS 15200 Product Description
78-13766-01
Chapter 1 Product Technology
Optical Channels
potentially conflicting protection schemes. You can add protection in the client layer described in the
“Physical Layout” section on page 3-5 . Figure 1-1 displays an example of ONS 15200 unprotected
channels.
Figure 1-1 Unprotected channels in an ONS 15200 system
1.2.2 Protected Channels
In optically-protected channels, data traffic flows in two physically separated streams to the receiving
node. The configuration of the receiving node determines which traffic flow is transferred to the client
layer of the receiving node.
Figure 1-2 displays an example of optical fiber-protected channels in an
ONS 15200 system. This form of optical channel protection is rapid and provides continued system
coverage in case of fiber breaks between nodes.
ONS 15200
CLIENT IN
CLIENT OUT
CLIENT OUT
CLIENT IN
LEGEND
ONS - Optical network system
54647