Installing the Router 3-17
Connecting Interface Cables
This section also provides instructions for connecting an optical bypass switch to a dual attachment
multimode network connection. Because the method of connecting optical bypass switches varies
between different manufacturer’s models, refer to the documentation for your particular bypass
switch for correct connection instructions. If you are installing an optical bypass switch, proceed to
the section “Installing an Optical Bypass Switch” in this chapter.
Warning Invisible laser radiation may be emitted from the aperture ports of the single-mode FDDI
products when no fiber cable is connected. Avoid exposure and do not stare into open apertures. This
product meets the Class 1 Laser Emission Requirement from CDRH FDDI.
Single Attach Connections
A FIP that is connected as a single-attach station (SAS) typically is connected to the ring through a
concentrator. The FIP receives and transmits the signal through the same physical interface, usually
PHYA. Depending on whether you are connecting to a single-mode of multimode fiber network,
connect the FIP as follows:
• Single-mode—Connect one single-mode interface cable to the PHYA transmit port and one to
the PHYA receive port. (See Figure 3-12.) Connect the opposite end of each cable to the
concentrator transmit and receive ports as specified by the concentrator manufacturer.
Figure 3-12 Single Attach Station (SAS), Single-Mode Fiber Network Connections
• Multimode—Connect the multimode interface cable between one of the M ports on the
concentrator and the PHYA port on the FIP. (See Figure 3-13.) Be sure to observe and match the
port labels on the MIC and the FIP ports; connect receive on the cable to PHYA receive. Follow
the concentrator manufacturer’s instructions for connecting the opposite end of the cable.
If you are connecting other FIPs as dual attach stations (DASs), proceed to the following section.
Otherwise, proceed to “Connecting the Console Terminal” in this chapter.
H2806
To
primary ring
From
primary ring
FIP
Single-mode,
single attachment.
Use two single-mode
cables for a single
attachment connection.
TX RX TX RX
PHY B PHY A
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