ACTUAL SPEED

       Actual speed of the line, in bits per second.  For internal clocking on
       some microcoded devices, a value of 0 indicates that the device has
       selected a speed appropriate for the connected interface.  For external
       clocking, a value of 0 indicates that the speed is unknown.

    DEVICE AVAILABILITY

       Indicates whether the hardware device associated with the named
       communications port is installed.  Support is mandatory on systems that
       support line card hot swap.  When device availability has the value no
       device, the interface state takes the value pending DTE Ready and the
       interface type attribute takes the value unknown.

    INTERFACE STATE

       State of the physical interface on the line.

          CONNECTED     -     A switched line is connected but not ready to
                              transmit or receive data.

          CONNECTING    -     Call setup on a switched line is in progress.

          DISCONNECTING -     Call clear on a switched line is in progress.

          DTE NOT READY -     The entity is disabled.

          DTE READY     -     The DTE is ready, but the DCE is not ready.

          FULL ENABLED  -     The line is enabled for data transmission and
                              reception.

          PENDING DTE READY - The entity is enabled but the ready state cannot
                              be entered. For example, the communications cable
                              is not connected.

          READY             - Both DTE and DCE are ready.

          RECEIVE ENABLED   - The line is ready to receive data.

          TRANSMIT ENABLED  - The line is ready for data transmission.

    INTERFACE TYPE

       Type of the physical interface connection.

         LOOPBACK   - A loopback connector has been detected on the interface.

         NO CABLE   - No cable is connected to the interface.

         NULL MODEM - A null modem cable is connected to the interface.

         RS232C     - A cable conforming to the RS232C standard is attached.

         RS422      - A cable conforming to the RS422 standard is attached.

         RS423-v24  - This value appears where a cable is attached but the
                      connector cannot distinguish between the RS423 and V.24
                      standards.

         RS449      - A cable conforming to the RS449 standard is attached.

         UNKNOWN    - A cable is attached but its type is not known

         V28        - A cable conforming to any of the CCITT V.24, V.28
                      standards, the IS 2110 standard, or the EIA-232-D
                      standard.

         V35        - A cable conforming to the V.35 standard is attached.

         X21        - A cable conforming to the X.21 standard is attached.

    LOOPBACK MODE

       Type of loopback in use on the line. The value of this status attribute
       is determined by the startloop and stoploop commands.

         CONNECTOR - Data is looped through a loopback connector attached to
                     the communications device.

         DEVICE    - Data is looped in the communications  device.

         DRIVER    - Data is looped in the driver of the communications device.

         EXTERNAL  - Data is looped through a null modem or a modem in loopback
                     mode.

         LOCAL     - The communications device has switched its local modem
                     into loopback mode.

         NULL      - The line is not in loopback mode.

         REMOTE    - The communications device has switched the remote modem
                     into loopback mode.

    MODEM TYPE

       String identifying the local modem. If this status attribute has no
       value, the type could not be determined.

    STATE

       Specifies the status of the modem connect line entity.

         OFF  - The line has been disabled.

         ON   - The line has been enabled.