Allied Telesis AT-FS708POE - Manual (Page 17)

AT-FS708/POE Fast Ethernet Switch Installation Guide
17
Port Descriptions
The following sections describe the types of ports on the AT-FS708/POE
Fast Ethernet switch:
ˆ “Twisted Pair Ports,” next
ˆ “SFP Port” on page 18
Twisted Pair
Ports
The AT-FS708/POE Fast Ethernet switch features eight 10/100Base-T
twisted pair ports.
The twisted pair ports feature 8-pin RJ-45 connectors. For the port pinouts,
refer to “RJ-45 Twisted Pair Port Connectors and Pinouts” on page 52.
The ports are 10Base-T and 100Base-T compliant and are capable of
10 megabits per second (Mbps) and 100 Mbps speeds. The ports are
IEEE 802.3u Auto-Negotiation compliant. With Auto-Negotiation, the
switch automatically matches the highest possible common speed
between each switch port and each end node. For example, if an end
node is capable of only 10 Mbps, the switch sets the port connected to the
end node to 10 Mbps.
Each twisted pair port on the switch can operate in either half- or full
duplex mode. The twisted pair ports are IEEE 802.3u-compliant and will
Auto-Negotiate the duplex mode setting.
Note
In order for the switch to set the duplex mode for each port correctly,
the end nodes that you connect to the switch ports should also use
Auto-Negotiation. Otherwise, a duplex mode mismatch can occur,
affecting network performance.
Each twisted pair port has a maximum operating distance of 100 m
(328 feet).
For 10 Mbps operation, Category 3 or better 100 ohm shielded or
unshielded twisted pair cabling is required. For 100 Mbps operation,
Category 5 and Enhanced Category 5 (5E) 100 ohm shielded or
unshielded twisted pair cabling is required.
All of the twisted pair ports on the switch are auto-MDI and IEEE 802.3ab-
compatible. When a port's speed and duplex mode are set through Auto-
Negotiation, the port uses the auto-MDI feature to automatically configure
itself as MDI or MDI-X when connected to an end node. Consequently,
you can use either a straight-through or crossover twisted pair cable when
connecting any network device to a port.
The ports can operate as either standard 10/100Base-T ports or as PoE