None � no near end and no far end tests are in progress. NearEndLineLpbk � a near end locally initiated DS3 line loopback test is in progress. NearEndPayloadLpbk � a near end locally initiated DS3 payload loopback test is in progress. NearEndLineFEACLpbk � an incoming FEAC containing the DS3 Line Loopback request initiatedthe DS3 line loopback that is currently in progress. FarEndPatt2to23 � XNOR of 18th and 23rd stage outputs feed back into 1st stage input. FarEndPatt2to20 - XOR of 17th and 20th stage outputs feed back into 1st stage input. FarEndPatt2to15 � XNOR of 14th and 15th stage outputs feed back into 1st stage input. farEndPatt2to23LineLpbk - both far end 2^23 and far end DS3 line loopback are progress. farEndPatt2to20LineLpbk - both far end 2^20 and far end DS3 line loopback are progress. farEndPatt2to15LineLpbk - both far end 2^15 and far end DS3 line loopback are progress.