The AT-FS750/16 and AT-FS750/24 Fast Ethernet Smart Switches feature 16 or 24 twisted pair ports and two pairs of uplink combo ports.
The twisted pair ports are 10Base-T and 100Base-TX compliant. They automatically set their speed and duplex mode with IEEE 802.3u Auto- Negotiation. If desired, you can disable Auto-Negotiation on a port and manually set the speed and duplex mode.
Note
If a switch port is connected to an end node that is not using Auto- Negotiation, you should disable Auto-Negotiation on the port and set its speed and duplex mode manually. Otherwise, a duplex mode mismatch can occur.
The ports have 8-pin RJ-45 connectors. For the port pinouts, refer to “Connectors and Port Pinouts” on page 42.
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.
Also featured on the ports is auto-MDI, which automatically configures the ports as MDI or MDI-X. This allows you to use straight-through twisted pair cable regardless of the configuration of the ports on the end nodes.
The switch has two pairs of uplink ports, each consisting of one 10/100/ 1000Base-T twisted pair port and one slot for an optional SFP transceiver. The ports are numbered 17 and 18 on the AT-FS750/16 Switch and 25 and 26 on the AT-FS750/24 Switch. These combo ports can be used to connect high speed devices to your network or to connect devices over large distances.
You can use one port in a combo pair at a time. A link on an SFP transceiver always takes precedence over a link on a 10/100/1000Base-T twisted pair port in the same combo pair. If the SFP slot is empty or if it has an SFP module but the module does not have a link to an end node, the 10/100/1000Base-T twisted pair port of the pair is active. If an SFP transceiver is installed and has a link to an end node, the twisted pair port in the pair is inactive.
The RS-232 console port is for local management of the switch with the AT-S80 Management Software. Local management uses the management cable supplied with the switch.
