Switch Features; Rj-45 10Base-T/100Base-Tx Ethernet Ports - Nortel BayStack Instant Internet 400-S User Manual

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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