ZyXEL GS-1548 User Guide - Page 28
Ethernet Ports, 3.1.2 Mini-GBIC Slots - 48
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Chapter 3 Hardware Overview The following table describes the ports on the panels. Table 1 Panel Connections CONNECTO R DESCRIPTION RJ-45 Gigabit Connect these Gigabit Ethernet ports to high-bandwidth backbone network Ethernet Ethernet switches or use them to daisy-chain other switches. Ports Mini-GBIC Slots Use mini-GBIC transceivers in these slots for fiber-optic connections to backbone Ethernet switches. 3.1.1 Ethernet Ports The GS-1524 has 24 auto-negotiating, auto-crossover RJ-45 Gigabit Ethernet ports. The GS-1548 has 48 auto-negotiating, auto-crossover RJ-45 Gigabit Ethernet ports. The speed of the Gigabit Ethernet ports can be 10 Mbps, 100Mbps or 1000Mbps and the duplex mode can be half duplex (at 100 Mbps) or full duplex. An auto-negotiating port can detect and adjust to the optimum Ethernet speed (100/1000Mpbs) and duplex mode (full duplex or half duplex) of the connected device.7 An auto-crossover (auto-MDI/MDI-X) port automatically works with a straightthrough or crossover Ethernet cable. 3.1.1.1 Default Ethernet Settings The factory default negotiation settings for the Ethernet ports on the Switch are: • Speed: Auto • Duplex: Auto • Flow control: Off 3.1.2 Mini-GBIC Slots There are four mini-GBIC (Gigabit Interface Converter) slots for mini-GBIC transceivers. A transceiver is a single unit that houses a transmitter and a receiver. The Switch does not come with transceivers. You must use transceivers that comply with the SFP Transceiver MultiSource Agreement (MSA). See the SFF committee's INF-8074i specification Rev 1.0 for details. 28 GS-1524/GS-1548 User's Guide