Tripp Lite NGI-S08C2POE8, Руководство пользователя

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4.4. Port Settings
State: In port configuration you can enable or disable the port. If the port is disabled the
port remains off without any operation. To keep it operating, place the port in enable state.
Speed:
It defines in which speed the port should operate. The speeds that it can operate are
10/100/1000Mbps. And also you can specify whether the port should operate in what
mode. The operating modes are half duplex and full duplex.

Duplex Mode
A duplex communication system is a system composed of two connected parties or devices that
can communicate with one another in both directions.
Half Duplex:
A
half-duplex
system provides for communication in both directions, but only one direction at a
time (not simultaneously). Typically, once a party begins receiving a signal, it must wait for the
transmitter to stop transmitting, before replying.
Full Duplex:
A full-duplex , or sometimes double-duplex system, allows communication in both directions,
and, unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks
are full-duplex, since they allow both callers to speak and be heard at the same time.

Loopback Test
A loopback test is a test in which a signal in sent from a communications device and returned
(looped back) to it as a way to determine whether the device is working right or as a way to pin
down a failing node in a network. One type of loopback test is performed using a special plug,
called a wrap plug that is inserted in a port on a communications device. The effect of a wrap
plug is to cause transmitted (output) data to be returned as received (input) data, simulating a
complete communications circuit using a single computer.

Auto MDI-MDIX
Auto-MDIX (automatic medium-dependent interface crossover) is a computer networking
technology that automatically detects the required cable connection type (straight-through or
crossover) and configures the connection appropriately, thereby removing the need for
crossover cables to interconnect switches or connecting PCs peer-to-peer. When it is enabled,
either type of cable can be used or the interface automatically corrects any incorrect cabling.
For Auto-MDIX to operate correctly, the speed on the interface and duplex setting must be set
to "auto". Auto-MDIX was developed by HP engineers Dan Dove and Bruce Melvin.