Setting this object to a value as detailed furter on (except 0) will initiate a test on the specific port, if the operation is allowed (according to TestMask). If the operation is not allowed, the mux will ignore the operation. The test/s requested will be set according to the respective bit: TEST BIT localLoop 1 remoteLoop 2 bert 3 plb 4 inband 5 prbs 8 loop2-v54 (RLB) 9 loop3-v54 (LLB) 10 Tone injection 13 Tx-plb 14 Tx-llb 15 DTE loop (HSSI) 16 HDSL-Tx-Inband 20 HDSL-Rx-Inband 21 Monitor 22 (test port) User Line Loopback 23 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 requested value is 3 -> 0000000000000011 -> Bits 1 & 2 are set -> the requested tests are : local-loop remote-loop Setting this object to stop (value=0 ; all bits are 0), will stop all the user requested tests running on the selected port; it will NOT stop the tests initiated by the system.