o  line type

    Type of line over which this link operates.

    nonswitched    The line is a nonswitched line.

    switched       The line is a switched line.

 o  maximum pdu size

    Maximum frame size, in octets, that this station will receive and
    transmit. This value includes the frame header.

 o  physical port

    Name of the Physical layer port with which the link is
    associated.

 o  protocol state

    State of the LAPB protocol with respect to the remote station.

    error          The protocol is in a recognized error state.

    halted         The protocol has halted.

    initializing   The protocol is being initialized.

    inoperative    The protocol cannot be started without
                   connectivity to the remote station.

    maintenance    The link is in maintenance mode.

    resetting      The protocol is undergoing a reset operation.

    running        The protocol is running normally.

 o  state

    Status of the lapb link entity.

    off   The link is disabled.

    on    The link is enabled.

 o  uid

    Entity's unique identifier, which is generated when the entity is
    created.