Chapter 1 Introducing the ZyWALL

1.3.1.1 1000Base-T Ports

The 1000Base-T auto-negotiating, auto-crossover Ethernet ports support 100/ 1000 Mbps Gigabit Ethernet so the speed can be 100 Mbps or 1000 Mbps. The duplex mode can be both half or full duplex at 100 Mbps and full duplex only at 1000 Mbps.

An auto-negotiating port can detect and adjust to the optimum Ethernet speed (100/1000 Mbps) and duplex mode (full duplex or half duplex) of the connected device.

An auto-crossover (auto-MDI/MDI-X) port automatically works with a straight- through or crossover Ethernet cable.

Default Ethernet Settings

The factory default negotiation settings for the Ethernet ports on the ZyWALL are:

•Speed: Auto

•Duplex: Auto

•Flow control: On (you cannot configure the flow control setting, but the ZyWALL can negotiate with the peer and turn it off if needed)

1.3.1.2Mini-GBIC Slots

These are slots for Small Form-Factor Pluggable (SFP) transceivers. A transceiver is a single unit that houses a transmitter and a receiver. Use a transceiver to connect a fiber-optic cable to the ZyWALL. The ZyWALL 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 ZyWALL is operating. You can use different transceivers to connect to devices with different types of fiber-optic connectors.

•Type: SFP connection interface

•Connection speed: 1 Gigabit per second (Gbps)

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

Transceiver and Fiber-optic Cable Installation

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

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ZyWALL USG 2000 User’s Guide