Cisco 7000 Series Hardware Installation And Maintenance page 130

Attachment
3-11 Dual
Figure
Optical
bypass
To
primary
ring
From
secondary
ring
To
secondary
ring
From
primary
ring
Dual Attachment
3-12
Figure
To
primary
ring
From
secondary
ring
To
secondary
ring
From
primary
ring
DAS
Station
Single-Mode
ir
po
DAS
Multimode
Station
Optical
Connecting Interface
Network Connections
Fiber
to
Network Connection
Fiber
Os
to
the Router
Installing
Cables
3-17