Chapter 3 Hardware Overview

The following table describes the ports.

Table 1 Panel Connections

CONNECTO

DESCRIPTION

R

 

20 100/1000 Connect these ports to a computer, a hub, an Ethernet switch or router.

Mbps RJ-45

 

Ethernet

 

Ports (XGS-

 

4526 only)

 

 

 

4 or 24 Dual

Each interface has one 1000Base-T copper RJ-45 port and one mini-GBIC

Personality

(Gigabit Interface Converter) fiber port, with one port active at a time.

Interfaces

 

• 4 or 24 1000Base-T Ports:

 

 

Connect these ports to high-bandwidth backbone network Ethernet

 

switches using Category 5/5e/6 1000Base-T Ethernet cables.

 

Use an 8-wire Ethernet cable for Gigabit connections. Using a 4-wire

 

Ethernet cable limits your connection to 100 Mbps. Note that the

 

connection speed also depends on what the Ethernet device at the

 

other end can support.

•4 or 24 Mini-GBIC Ports:

Use Small Form-Factor Pluggable (SFP) transceivers in these ports for 1000Base-X fiber-optic connections to backbone Ethernet switches.

3.1.1Dual Personality Interfaces

There are 4 or 24 Dual Personality interfaces, comprising 4 or 24 1000Base-T/ mini-GBIC combo ports. For each interface you can connect either to the 1000Base-T port or the mini-GBIC port. The mini-GBIC ports have priority over the 1000Base-T ports. This means that if a mini-GBIC port and the corresponding 1000Base-T port are connected at the same time, the 1000Base-T port will be disabled.

3.1.2 1000Base-T Ports

The Switch has 24 1000Base-T auto-negotiating, auto-crossover Ethernet ports. In 100/1000 Mbps Gigabit Ethernet, 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.

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XGS-4526/4528F/4728F User’s Guide