Gigabit Ethernet Interface Modules; 1000Base-Sx Gigabit Ethernet Modules; 1000Base-T Gigabit Ethernet Modules - 3Com 4005 Installation And Maintenance Manual

Gigabit Ethernet
Interface Modules
1000BASE-SX
Gigabit Ethernet
Modules
1000BASE-T
Gigabit Ethernet
Modules
3Com offers six Gigabit Ethernet modules to suit different cabling infrastructures
and density requirements. This section outlines the physical attributes of each module.
Model Number — 3C16825 (1 SC-type port), 3C16842 (2 MT-RJ ports)
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Size — Occupies one slot in the Switch 4005 chassis
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Functionality — Layer 2 and Layer 3 switching
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Physical features:
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Release button and LED are used to remove the module.
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1000BASE-SX ports provide a 1000 Mbps, full duplex connection.
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Module and Port LEDs — See Table 13 on page 56 for definitions.
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Front faceplate — See Figure 20 on page 55 for details.
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Cabling requirements:
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50 micron Multimode fiber; maximum segment length is 500 m (1640 ft).
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62.5 micron Multimode fiber; maximum segment Length is 220 m (722 ft).
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Model Number — 3C16827 (1 port), 3C16841 (2 ports)
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Size — Occupies one slot in the Switch 4005 chassis
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Functionality — Layer 2 and Layer 3 switching
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Physical features:
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Release button and LED are used to remove the module.
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1000BASE-T RJ-45 ports provide auto-negotiation for connection speed
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(10/100/1000), duplex mode, and flow control.
Module and Port LEDs — See Table 13 on page 56 for definitions.
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Front faceplate — See Figure 20 on page 55 for details.
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Cabling requirements:
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Category 5 UTP or STP works for 1000BASE-T as long as all four pairs are
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connected. For more reliable performance, we recommend using Category
5E as noted in the ANSI/TIA/EIA-568-A-5 specification.
Maximum segment length: 100 m (328 ft) for half duplex or full duplex.
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All RJ-45 ports on the module have automatic MDI/MDI-X detection at all
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speeds. Table 12 lists the 1000BASE-T MDI and MDI-X port pinouts:
Table 12 1000BASE-T (MDI/MDI-X) Port Pinouts
Pin MDI Signal Name
1 Transmit Data plus (TD1+)
2 Receive Data minus (RD1-)
3 Transmit Data plus (TD2+)
4 Transmit Data plus (TD3+)
5 Receive Data minus (RD3-)
6 Receive Data minus (RD2-)
7 Transmit Data plus (TD4+)
8 Receive Data minus (RD4-)

Gigabit Ethernet Interface Modules

MDI-X Signal Name
Transmit Data plus (TD2+)
Receive Data minus (RD2-)
Transmit Data plus (TD1+)
Transmit Data plus (TD4+)
Receive Data minus (RD4-)
Receive Data minus (RD1-)
Transmit Data plus (TD3+)
Receive Data minus (RD3-)
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