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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)

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