Chapter 3 Hardware Overview

3.1.2.1 Default Ethernet Negotiation Settings

The factory default negotiation settings for the Gigabit ports on the Switch are:

•Speed: Auto

•Duplex: Auto

•Flow control: Off

•Link Aggregation: Disabled

3.1.2.2Auto-crossover

All ports are auto-crossover, that is auto-MDIX ports (Media Dependent Interface Crossover), so you may use either a straight-through Ethernet cable or crossover Ethernet cable for all Gigabit port connections. Auto-crossover ports automatically sense whether they need to function as crossover or straight ports, so crossover cables can connect both computers and switches/hubs.

3.1.3 Mini-GBIC Slots

These are slots for mini-GBIC (Gigabit Interface Converter) 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 Small Form-factor Pluggable (SFP) Transceiver MultiSource Agreement (MSA). See the SFF committee’s INF-8074i specification Rev 1.0 for details.

You can change transceivers while the Switch is operating. You can use different transceivers to connect to Ethernet switches with different types of fiber-optic or even copper cable connectors.

To avoid possible eye injury, do not look into an operating fiber- optic module’s connectors.

•Type: SFP connection interface

•Connection speed: 1 Gigabit per second (Gbps)

3.1.3.1Transceiver Installation

Use the following steps to install a mini-GBIC transceiver (SFP module).

1Insert the transceiver into the slot with the exposed section of PCB board facing down.

2Press the transceiver firmly until it clicks into place.

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MGS-3712/MGS-3712F User’s Guide