Specifications

Cisco ONS 15454 Product Overview
Network Configuration
42
Cisco ONS 15454 Product Overview, R3.3
May 2002
Figure 25 shows a UPSR subtending from a BLSR. In this example, Node 3 is the
only node serving both the BLSR and UPSR. Optical cards in Slots 5 and 12 serve
the BLSR, and optical cards in Slots 6 and 13 serve the UPSR.
Figure 25 UPSR subtending from a BLSR
Linear Add/Drop Multiplexer Mode
In ADM configuration, intermediate nodes have direct access to eastbound or
westbound STS channels along a fiber route, and can connect any STS to any
other STS for transport along the network. ADM configurations eliminate the
need for costly “back-to-back” terminal configurations and can be enhanced with
1+1 protection for any or all transport spans in the system. Figure 26 shows an
ADM configuration.
Path
Protected
Nodes
BLSR
BLSR
55302