Allied Telesis AT-8550SP - Manual (Page 25)

AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
25
For 10 Mbps, the port requires Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling. For 100 or 1000 Mbps operation, the ports
require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or
unshielded twisted pair cabling.
Auto-MDI/MDI-X
The ports are auto-MDI/MDI-X. They automatically configure themselves
as either MDI or MDI-X. This feature allows you to use a straight-through
twisted pair cable to connect any type of device to a port.
Note
The auto-MDI/MDI-X feature on a 10/100/1000Base-T port is
functional only when the port is set to Auto-Negotiation. If you
disable Auto-Negotiation and set the port’s speed and duplex mode
manually, the port defaults to MDI-X. For instructions on configuring
a port, refer to the AT-S62 Management Software User’s Guides.
Port Pinouts
For the pinouts of these ports when operating at 10 or 100 Mbps, refer to
Table 12 on page 83. For port pinouts when the ports are operating at
1000 Mbps, refer to Table 14 on page 84.
100Base-FX
Fiber Optic Ports
This section applies to the AT-8516F/SC switch.
Type of Connector
The fiber optic ports on the AT-8516F/SC switch have dual SC connectors.
Speed
The fiber optic ports have a fixed operating speed of 100 megabits per
second (Mbps). The speed cannot be changed.
Duplex Mode
The fiber optic ports can operate in either half- or full-duplex mode. You
can set the duplex mode manually or allow the switch to set it
automatically through Auto-Negotiation.
Maximum Distance
Each fiber optic port has a maximum operating distance of two kilometers
(1.25 miles) when operating in full-duplex mode and 412 meters (1,360
feet) when operating in half-duplex mode.