FS750 Series Fast Ethernet Switches Installation Guide
17
Twisted-Pair Ports
The AT-FS750/20, AT-FS750/28, AT-FS750/28PS, and AT-FS750/52
Fast Ethernet Switches feature 16, 24, 24, and 48 twisted-pair ports,
respectively. These ports are 10Base-T and 100Base-TX compliant. You
can set the port speeds and duplex modes either automatically with IEEE
802.3u Auto-Negotiation or manually with the WebSmart management
software.
The twisted-pair ports feature 8-pin RJ-45 connectors. For the port
pinouts, see “Connectors and Port Pinouts” on page 48.
The ports have a maximum operating distance of 100 m (328 feet). For 10
Mbps operation, the ports require Category 3 or better 100 ohm shielded
or unshielded twisted-pair cabling. For 100 Mbps operation, the ports
require Category 5 or Enhanced Category 5 (5E) 100 ohm shielded or
unshielded twisted-pair cabling.
The ports feature auto-MDI, which automatically configures the ports as
MDI or MDI-X. This feature allows you to use straight-through twisted-pair
cables, regardless of the wiring configurations of the ports on the end
nodes.
A switch port connected to an end node that is not using
Auto-Negotiation should not use Auto-Negotiation to set the speed
and duplex mode, because a duplex-mode mismatch may occur. In
this case, disable Auto-Negotiation and set the port’s speed and
duplex mode manually.
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