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Cabling Requirements
Cabling Requirements
Following are the cabling requirements for the A/B port cards.
FDDI
The multimode FDDI connectors on the switch accept 62.5/125-micron or 50/125-micron
multimode fiber with standard FDDI media interface connectors (MICs). The single-mode
connectors accept 8.7 to 10/125-micron single-mode fiber with standard FDDI ST-type connectors.
Table 1 lists FDDI distance specifications and Figure 1 and Figure 2 illustrate single-mode and
multimode connectors, respectively.
Table 1
Transceiver Type
Single-mode
Multimode
Figure 1
Warning Invisible laser radiation may be emitted from the aperture ports of the single-mode FDDI
card when no cable is connected. Avoid exposure and do not stare into open apertures.
Figure 2
CDDI
Check all existing cables to ensure that you have the proper connectors (modular RJ-45) and for
conformance with the following CDDI/MLT-3 distance requirements and:
•
•
2 Installing A/B Port Cards
FDDI Maximum Transmission Distances
Maximum Distance Between Stations
18.6 miles (up to 30 km)
1.2 miles (up to 2 km)
Single-Mode FDDI Interface Connector—ST Type
Multimode FDDI Interface Connector—MIC Type
Data-grade unshielded twisted-pair (UTP) wiring—Electronics Industries
Association/Telecommunications Industries Association (EIA/TIA)-568 category 5, data-grade
cable is required for CDDI installations. The total length of data grade UTP cable from the switch
to another switch, station, or CDDI concentrator must not exceed 330 feet (100.6 m), including
patch cords and cross-connect jumpers.
Shielded twisted-pair (STP) wiring—You must use IBM Type 1 STP wiring for your CDDI
installation. The total length of STP cable measured from the adapter or media access unit
(MAU) to the switch must not exceed 330 feet (100.6 m).
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