Description: Indicates the loopback status of the near end DS1 on this 
DS3 when loopback request is indicated.

Following table lists the mapping of Bit position to
DS1 or DS3 lines and the value.

Bit Position     Line number      value
----------------------------------------

 0               DS3 Line       0 = no loop(loop down)
                                1 = loop(loop up)

 1               DS1 line 1     0 = loop down
                                1 = loop up

 2               DS1 line 2     0 = loop down
                                1 = loop up

 3               DS1 line 3     0 = loop down
                                1 = loop up
 ...
 ...

 28              DS1 line 28    0 = loop down
                                1 = loop up

 29              all DS1 lines  0 = loop up
                                1 = loop down