This object indicates which tests are running currently on the selected port (initiated by user and/or by the system). If a specific test is currently running on the port, its respective bit will be SET: TEST BIT localLoop 1 remoteLoop 2 bert 3 plb 4 llb 5 txInband 6 rxInband 7 prbs 8 loop2-v54 (RLB) 9 loop3-v54 (LLB) 10 DDS DSU loop 11 DDS CSU loop 12 Tone injection 13 Tx-plb 14 Tx-llb 15 DTE loop (HSSI) 16 Local DTE loop (HSSI)17 Local Line loop (HSSI)18 Remote Line loop (HSSI)19 HDSL-Tx-Inband 20 HDSL-Rx-Inband 21 Monitor 22 (test port) User Line Loopback 23 Network Line Loopback 24 Rem-Loop-on-Rem-Unit 25 LBBD 26 LB1 27 LB2 28 BERT-on-Rem-Unit 29 TS Remote Loop 30 LLB-on-Rem-Unit 31 e.g : If the return value is 3 -> 0000000000000011 -> Bits 1 & 2 are set -> the running tests are : local-loop remote-loop llb (Bit 5) - can be initiated by system only!