Nortel Networks 400-S User Manual download pdf (Page 52)

52 Chapter 4 Seven-port autosensing switch specifications

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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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Nortel Networks 400-S User Manual Page 52