22 Installing and Upgrading the CSC-C2FCIT FDDI Card and Appliques
Installing Cards and Appliques
Figure 15
Orientation of the Ribbon Cables on the FDDI Applique
Connecting the External Fiber-Optic Cables
Following is the procedure for connecting the external FDDI cables. Refer to Figure 6 for an
illustration of the single-mode FDDI connector and to Figure 7 for illustrations of the single-mode
and multimode FDDI connectors.
Warning
Invisible laser radiation may be emitted from the aperture ports of the single-mode
appliques 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.
Step 1
If you are not installing an optical bypass switch, skip to step 3.
Plug the male DIN connector (from the optical bypass switch) into the female DIN
connector on the APP-LMM applique, then plug the fiber-optic MIC cables from the
bypass switch into the PHY-A and PHY-B connectors on the FDDI applique.
Step 2
Connect the FDDI cables from the network into the PHY-A and PHY-B connectors on the
optical bypass switch. Up to 100 milliamperes of current can be supplied to the optical
bypass switch. A pinout of the DIN connector on the optical bypass switch is listed in
Table 5.
Table 5
Optical Bypass Switch Pinout
Pin No.
Description
1
+5V to secondary switch
2
+5V to primary switch
3
Ground to enable primary switch
4
Ground to enable secondary switch
5
Sense circuit—1 kohm to +5V
6
Ground—sense circuit return
H1551a
P4
Cables to FDDI
interface card
P3
P2
P1
FDDI applique
FDDI A, E, I, M
FDDI B, F, J, N FDDI C, G, K, O
FDDI D, H, L, P
