3Com 3CRDSF9PWR-US - OfficeConnect Managed Fast Ethernet PoE Switch User Manual - page 115
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Duplex
— Displays the port duplex mode. This field is configurable
only when the port speed is set to 10M or 100M or 1000M per
second. The possible field values are:
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Full
— The interface supports transmission between the device and
its link partner in both directions simultaneously.
■
Half
— The interface supports transmission between the device
and the client in only one direction at a time.
■
Auto
— Indicates that port duplex mode is set to an optimal value
based on advertised capabilities.
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PVID
— VLAN ID assigned to untagged frames received on this port.