Description: Each bit of this value set to '1' indicates a specific status
        condition in this DSU, or a fault or status condition in its
        associated CSU.

        Octets are numbered in the order in which they appear in the PDU.
        Bits are numbered from the most-significant leftmost bit in the
        octet (bit 0) to the least-significant rightmost bit (bit 7).

        Cajun numbering continues across octets, so that octet 1 bit 0 is
        called bit 8 in the Cajun scheme.  That number is also shown below,
        with the octet value for each single bit set.

        If the CSU is reporting a Blue Alarm (AIS), multiple other alarms
        may be hidden by the Blue Alarm.

--  The four octets of the T1E1 status mask are taken from three different
--  maintenance APIs and assembled by the SNMP agent.

        Octets 0-1 show CSU fault status.
--  From t1e1csu_status.mask, built by the macro T1E1CSU_STATUS_MKMASK.
--  This is defined in CAPIStructures.h:851 and used in T1E1Csu.C:194.

        Octet 2 shows CSU loopbacks active.
--  From t1e1csu_lpbkstatus.mask, built by the macro T1E1CSU_LPBKSTATUS_MKMASK.
--  This is defined in CAPIStructures.h:803 and used in T1E1Csu.C:173.

        Octet 3 shows DSU loopbacks active.
--  From t1e1dsu_tstmgmt.mask, built by the macro T1E1DSU_TSTMGMT_MKMASK
--  This is defined in CAPIStructures.h:1115 and used in T1E1Dsu.C:1574.
--  Note this just copies t1e1dsu_tstmgmt.status_lpbk into the mask field.
--  Don't confuse t1e1dsu_tstmgmt.lpbk and t1e1dsu_tstmgmt.status_lpbk.  The
--  first is what a CLI user requested; the second is what the board reports.
--
--  The bit assignments are chosen to facilitate retrieval from the board.

    Cajun  Octet Octet
    bit#   bit#  value  Meaning
    -----  ----- -----  -------
    0-5    0/0-5        Unused.
    6      0/6   0x02   CSU CRC multiframe lost (LCM) - E1 only
    7      0/7   0x01   CSU remote multiframe alignment lost (RMA) - E1 only

    8      1/0   0x80   CSU local multiframe alignment lost (LMA) - E1 only
    9      1/1   0x40   CSU polar density violations (PDV) - in the T1 configuration
                        using AMI line coding, this is equivalent to bipolar
                        violations (BPV).
    10     1/2   0x20   CSU alarm indication signal (AIS, Blue Alarm).
    11     1/3   0x10   CSU remote alarm indication signal (RAI, Yellow Alarm).
    12     1/4   0x08   CSU loss of frame (LOF, Red Alarm) - unable to synchronize
    13     1/5   0x04   CSU excessive error rate (EER) - applies to ESF framing only.
                        on DS1 signal.
    14     1/6   0x02   CSU out of frame (OOF) - 2 of 4 frame synchronization bits
                        in error.
    15     1/7   0x01   CSU loss of signal (LOS) - 175 consecutive zeroes received.

    16-20  2/0-4        Unused.
    21     2/5   0x04   CSU Digital diagnostic loopback active (towards DTE).  This is
                        the equivalent of either equipment (DTE) or repeater loopback
                        in the Paradyne 3160.
    22     2/6   0x02   CSU Line loopback active (towards network).
    23     2/7   0x01   CSU Payload loopback active (towards network).

    24-26  3/0-2        Unused.
    27     3/3   0x10   DSU Far-end Data Channel loopback active.
    28     3/4   0x08   DSU Data Terminal loopback active.
    29     3/5   0x04   DSU Remote loopback active.
    30     3/6   0x02   DSU Near-end Data Channel loopback active.
    31     3/7   0x01   DSU Local DTE loopback active.