Enterasys NetSight Element Manager, Руководство пользователя

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The MicroMMAC-T Chassis View
2-22 Managing the Hub
Figure 2-11. The Ring Port Status Window
Ring Port Status Window Fields
The window contains the following fields:
Board Number
The HubSTACK Interconnect Bus port number on the MicroMMAC-T occupied
by the module containing the selected ring port.
Port
Displays the port index number and type (Ring In/Ring Out) of the selected ring
port.
Last Wire Fault
This field displays either the last date and time the MicroMMAC-T was reset, or
the date and time that a wire fault on the selected port last occurred.
Media Type
This field allows you to select the media type of the ring port. This field does not
apply to the MicroMMAC-T, and is therefore grayed-out.
Phantom Current
This field allows you to activate or deactivate phantom current for the selected
ring port. Devices that support this feature — called the autowrap feature — use a
phantom current to act as a carrier sense between two connected ring ports. If the
carrier sense is broken (i.e., the wire is broken) the phantom current is lost and the
ports automatically wrap to maintain the continuity of the ring.