24-port NWay Ethernet Switch User’s Guide
10 Identifying External Components
♦ Two-port, front-panel module.
♦ Connects to 100BASE-FX devices at full- or half-duplex.
♦ Supports multi-mode fiber-optic cable connections of up to 412 meters in half duplex or 2 km in full duplex mode.
1000BASE-SX Gigabit Module
Figure 3-8. One-port, 1000BASE-SX module
♦ One-port, rear-panel module.
♦ Connects to 1000BASE-SX devices at full duplex or auto (auto negotiation is available in DES-3251G, version A3 and
later).
♦ Allows connections using multi-mode fiber optic cable in the following configurations:
62.5µµ m 62.5µµ m 50µµ m 50µµ m
Modal bandwidth
(min. overfilled launch)
Unit: MHz*km
160 200 400 500
Operating distance
Unit: meters
220 275 500 550
Channel insertion loss
Unit: dB
2.33 2.53 3.25 3.43
1000BASE-LX Gigabit Module
Figure 3-9. One-port, 1000BASE-LX module
♦ One-port, rear-panel module.
♦ Connects to 1000BASE-LX devices at full duplex or auto (auto negotiation is available in DES-3251GL, version A3 and
later).
