3Com 3CB9RG4, Быстрый старт

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4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 23
GBIC SX Transceivers
The 1000BASE-SX transceiver supports a direct connection to
62.5-micron or 50-micron multimode fiber-optic cable.
Table 7 lists the transmission ranges for each GBIC SX connection.
GBIC LX Transceivers
The 1000BASE-LX transceiver supports these connections:
■
Direct connection to single-mode fiber-optic cable
■
Connection to multimode fiber through a conditioned launch cable
To ensure optimal performance, compatibility, and regulatory compliance,
use only conditioned launch cables that 3Com supports. For a list of
currently supported conditioned launch cables, see this 3Com Web site:
http://www.3com.com/gigabit_ethernet/gbics
Table 8 lists the transmission ranges for each GBIC LX connection.
Table 7
GBIC SX Transmission Ranges
Fiber Type
Diameter
(microns) Modal Bandwidth
(MHz*km) Transmission Range
in meters (feet)
Multimode 62.5 160 2
–
220 (6.6
–
721.8)
Multimode 62.5 200 2
–
275 (6.6
–
902.3)
Multimode 50 400 2
–
500 (6.6
–
1640.5)
Multimode 50 500 2
–
550 (6.6
–
1804.6)
Table 8 GBIC LX Transmission Ranges
Fiber Type
Diameter
(microns) Modal Bandwidth
(MHz*km) Transmission Range
in meters (feet)
Multimode 62.5 500 2
–
550 (6.6
–
1804.6)
Multimode 50 400 2
–
550 (6.6
–
1804.6)
Multimode 50 500 2
–
550 (6.6
–
1804.6)
Single-mode 9 – 2
–
10,000 (6.6
–
32,810)