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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 12 SONET Topologies and Upgrades
12.4.2 Path Protection DRI
Figure 12-23 ONS 15454 Integrated Path Protection Dual-Ring Interconnect
Path Selector
Primary Path, Primary
Return Path, Secondary
Return Path, Primary
Primary Path, Secondary
ONS 15454
Path Protection
Configuration 1
ONS 15454
Path Protection
Configuration 2
DS1/EC1/DS3/GigE
Duplicate
Signals
Pass-through
Node
DS1/EC1/DS3/GigE
Bridge
85762
Cross
Connect
Cross
Connect
ONS 15454 DRI Node 1 of 2
supporting two-rings with
integrated STS-1 and
VT1.5 grooming