52 Chapter 4 Seven-port autosensing switch specifications
Switch features
The Instant Internet 400-S unit seven-port switch offers:
•Seven RJ-45 10BASE-T/100BASE-T autosensing Ethernet ports with autonegotiation capability. The eighth port is used internally to connect to the internal Ethernet controller.
•Comprehensive 10/100 Link/Activity LEDs indicating link and activity status.
•Full-duplex (FDX) and half-duplex (HDX) mode support with one indicator LED per port.
•MDI (uplink, or crossover)/MDI-X (normal, or straight-through) autosensing capability.
•Store-and-forward switching architecture.
•One MB buffer memory.
When you plug an Ethernet cable into a port, the switch:
•Autosenses the transmission speed (10 Mb/s or 100 Mb/s) of the connected device.
•Autonegotiates with the connected device to operate in full- or half-duplex mode. If the connected device is operating in half-duplex mode only, or does not have the capability to participate in the autonegotiation process, the port defaults to half-duplex mode.
•Autosenses whether the cable is MDI or MDI-X.
RJ-45 10BASE-T/100BASE-TX Ethernet ports
The RJ-45 10BASE-T/100BASE-TX Ethernet ports connect the switch to network devices using standard unshielded twisted pair (UTP) cable. The Instant Internet 400-S switch does not support shielded twisted-pair (STP) cable. Each port adapts to the correct network speed of 10 Mb/s or 100 Mb/s through autonegotiation with the network interface card (NIC), hub, or other switch connected to the Instant Internet unit.
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