3Com LINKBUILDER 3C18500 User Manual page 151

Extending the Local Ring Section 9-19
the Backup Ring at the Ring-In port.
Figure 9-14 Wrapped RingBuilder Mode
The wrapped mode can be used to remove a RingBuilder from the ring
for maintenance purposes without interrupting the external ring, or to
temporarily return the ring to normal operation while a faulty trunk
cable or a connector is replaced. This can be achieved by wrapping
both the Ring-In and Ring-Out ports. See figure below.
Figure 9-15 Using Wrapped Mode To Isolate MSH Resident Devices
DUA1850-0AAA05