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Chapter 3 Hardware Overview
XGS-4526/4528F/4728F User’s Guide
38
The following table describes the ports.
3.1.1 Dual 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.
Table 1 Panel Connections
CONNECTO
R
DESCRIPTION
20 100/1000
Mbps RJ-45
Ethernet
Ports (XGS-
4526 only)
Connect these ports to a computer, a hub, an Ethernet switch or router.
4 or 24 Dual
Personality
Interfaces
Each interface has one 1000Base-T copper RJ-45 port and one mini-GBIC
(Gigabit Interface Converter) fiber port, with one port active at a time.
• 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.