Installing An Optical Bypass Switch - Cisco 7000 Series Hardware Installation And Maintenance Manual

Connecting Interface Cables
Figure 3-17
FIP
If you are connecting an optical bypass switch, proceed to the next section. Otherwise, proceed to
"Connecting the Console Terminal" in this chapter.

Installing an Optical Bypass Switch

An optical bypass switch is a device installed between the ring and the station that provides
additional fault tolerance to the network. If a FIP that is connected to a bypass switch fails or shuts
down, the bypass switch activates automatically and allows the light signal to pass directly through
it, bypassing the FIP completely. (See Figure 3-18 or Figure 3-19.) A port for connecting an optical
bypass switch is provided on the multimode/multimode FIP (CX-FIP-MM) and the
single-mode/single-mode FIP (CX-FIP-SS).
Figure 3-18
To
ring
Figure 3-19
3-20 Cisco 7010 Hardware Installation and Maintenance
FDDI Dual Attach Network Connections, Single-Mode and Multimode
FC connectors (2)
CX-FIP-MM Connection with Optical Bypass
FIP
Optical bypass
switch
PHY A
PHY B
Bypass operation
CX-FIP-SS Connection with Optical Bypass
TX RX
TX RX
PHY B
Receive
Transmit
To single-mode To multimode
network
Optical bypass
control cable
B
Mixed-mode
configurations.
Use multimode and
single-mode cables
for mixed-mode
configurations.
PHY A
MIC
network
A