User's Manual

10
Recommended Cables and Cable Specifications
Table 3 lists the IEEE 802.3u cabling specifications for the media converters.
Refer to Table 3 for cabling recommendations.
Note 1. Single-mode fiber transmitter is rated as a Class 1 laser.
Note 2. Each Media Converter used inline within a single collision domain will reduce the overall segment length by
40 m (131.24 ft) of fiber.
Note 3. Applies only to the AT-MC103XL, Single Mode Fiber Optic Transmitter/Receiver.
Note 4. Applies only to the AT-MC103LH, Single Mode Fiber Optic Transmitter/Receiver.
Table 3
IEEE 802.3u Cabling Specifications for Media Converters
100Base-FX 100Base-TX
Media 1300 nm multimode fiber, 50/125 micron
1300 nm multimode fiber, 62.5/125 micron
1300 nm single-mode fiber, 9/125 micron
(see Note 1)
Unshielded/
Shielded Twisted
Pair Category 5 only
Topology Star, Tree Star, Tree
External
Devices
Network Adapter Card, Repeater, Switch, Router, or
Bridge
Network Adapter
Card, Repeater,
Switch, or Router
Maximum
Segment
Length
100BaseFX Full-Duplex operation:
Multimode fiber (MMF), 2 km (1.2 mi)
Single mode fiber (SMF), 15 km (9.32 mi) (XL
model only, see Note 3.)
Single mode fiber (SMF), 40km (24.9 mi) (LH model
only, see Note 4.)
100BaseFX Half-Duplex operation:
The total distance of all fiber runs cannot exceed
the following limits: (see Note 2)
with
one Media Converter
inline:
Switch to Switch = 372 m (1221 ft)
Work Station to Switch = 372 m (1221 ft)
Switch to Class II Repeater = 185 m (607 ft)
Switch to Class I Repeater = 137 m (450 ft)
with
two Media Converters
inline:
Switch to Switch = 332 m (1089 ft)
Work Station to Switch = 332 m (1089 ft)
Switch to Class II Repeater =145 m (476 ft)
Switch to Class I Repeater = 97 m (318 ft)
328 ft (100 m)