Cisco ONS 15200 - Manual (Page 19)

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Cisco ONS 15200 Product Description
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Chapter 1 Product Technology
Optical Channels
Figure 1-2 Optically-fiber protected channels in an ONS 15200 system
Client-layer protection schemes for the ONS 15200 are:
• SONET/SDH ADM rings—Traffic travels in two directions between any two nodes. If one route
fails, the alternate route continues to transport the traffic.
• Client-layer 1+1 APS—Two separate connections exist between two client-layer interfaces. One of
the connections is standby and is used only when the active connection fails.
• Layer 3 load sharing—Two routes transport traffic from one client to a dual home node (see
Chapter 2, “Product Configurations” for a description of the dual home node configuration). The
routes are used below their maximum capacity. If one of the two routes fails, the traffic shifts to the
other route.
1.2.3 Software Configurable Protection
In Release 1.1, the 2R/3R (unclocked/clocked) Client Layer Interface Port (CLIP) module is user
configurable for unprotected or fiber protected operation.
CLIENT INPUT
SIGNAL CLIENT OUTPUT
SIGNAL
OPTICAL
CHANNEL
A
OPTICAL
CHANNEL
B
SELECTOR
DIVIDER
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ONS 15200
LEGEND
ONS - Optical network system