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Chapter 3 Hardware Panels
XMG-100 Series User’s Guide
17
3.1.1 Multi-gigabit Ethernet Ports
The Switch has 2.5G Base-T auto-negotiating, auto-crossover Ethernet ports. In 100 Mbps / 1/2.5 Gbps
multi-gigabit, the speed can be 100 Mbps, 1 Gbps or 2.5 Gbps and full duplex mode.
The 100 Base-TX / 1G Base-T / 2.5G Base-T RJ-45 ports are auto-negotiating and auto-crossover.
An auto-negotiating port can detect and adjust to the optimum Ethernet speed (100 Mbps / 1 Gbps /
2.5 Gbps) and duplex mode (full duplex) of the connected device.
An auto-crossover (auto-MDI/MDI-X) port automatically works with a straight-through or crossover
Ethernet cable.
When auto-negotiation is turned on, an Ethernet port negotiates with the peer automatically to
determine the connection speed and duplex mode. If the peer Ethernet port does not support auto-
negotiation or turns off this feature, the Switch determines the connection speed by detecting the signal
on the cable. When the Switch’s auto-negotiation is turned off, an Ethernet port uses the pre-configured
speed and duplex mode when making a connection, then requiring you to make sure that the settings
of the peer Ethernet port are the same in order to connect.
3.1.1.1 Auto-crossover
All ports support 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 multi-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 or hubs.
3.1.2 SFP+ Slot
Refer to Section 1.1 on page 7 for more information on hardware differences between models.
This is a slot for SFP (Small Form-Factor Pluggable) module, such as an SFP transceiver. A transceiver is a
single unit that houses a transmitter and a receiver. Use a transceiver to connect a fiber optic cable to
the Switch. The Switch does not come with a transceiver. You must use a transceiver that complies 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 transceiver while the Switch is operating. You can use a different transceiver to
connect to Ethernet switches with different types of fiber optic or even copper cable connectors.
• Type: SFP+ connection interface
• Connection speed: 1/10 Gbps
WARNING! To avoid possible eye injury, do not look into an operating
fiber optic module’s connectors.
HANDLING! A transceiver is static sensitive. To prevent damage from
electrostatic discharge (ESD), it is recommended you attach an ESD
preventive wrist strap to your wrist and to a bare metal surface when
you install or remove a transceiver.
STORAGE! All modules are dust sensitive. When not in use, always keep
the dust plug on. Avoid getting dust and other contaminant into the
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