Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual page 433

Chapter 12 SONET Topologies and Upgrades
Figure 12-23
ONS 15454 DRI Node 1 of 2
supporting two-rings with
78-18106-01
ONS 15454 Integrated Path Protection Dual-Ring Interconnect
integrated STS-1 and
Connect
VT1.5 grooming
Bridge
Path Selector
Primary Path, Primary
Primary Path, Secondary
Return Path, Primary
Return Path, Secondary
DS1/EC1/DS3/GigE
ONS 15454
Path Protection
Configuration 1
Duplicate
Signals
Cross Cross
Connect
ONS 15454
Path Protection
Configuration 2
DS1/EC1/DS3/GigE
Cisco ONS 15454 Reference Manual, R8.5
12.4.2 Path Protection DRI
Pass-through
Node
12-25