DECrepeater 90FS Installation and Configuration
61
Redundant Fiber-Optic Link Configuration (Cont.)
Full Fault Detection
The DECrepeater 90FS supports full fault detection. This feature enables the master
module to react to failures at either end of the receive or transmit media.
If a failure occurs in the responder’s receive port, the responder signals its partner
master port. This allows the master to switch over to the standby port.
When the DECrepeater 90FS fiber-optic ports are connected to another redundant
fiber-optic repeater, such as the DECrepeater 900FP (as shown in the following
illustration) or another DECrepeater 90FS, full fault detection is available.
LKG-9179–94I
Port a
Tx
Rx
Port m
Tx
Rx
Port b
Tx
Rx
Port n
Tx
Rx
DECrepeater 90FS
DECrepeater 900FP
Master
port pair
Full Fault Detection Configuration Example
The master can detect a
link failure here.
Secondary link
(initially standby
and disabled)
Primary link (initially active)
If there is a link failure here,
the responder port signals
its master so that the master
can detect the failure.
Single
responder port
Single
responder port
These ports may
be on the same
module or
separate modules.
(always enabled)
(always enabled)
Содержание DECrepeater 90FS
Страница 78: ......