This is an Expanded test mask of the prtGenTestMask object. The prtGenTestMask object reached its maximum, being an Integer with 31 bits. This object indicates which tests from the 'prtGenTestCmdXP' list are allowed for the selected port. If a specific test is allowed, its respective bit will be SET in the mask : TEST BIT localLoop 1 =LSB 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 Downstream-AIS 32 Upstream-AIS 33 Send-RDI 34 Test Per TS 35 e.g : If the return value is 00000003 hex -> Bits 1 & 2 are set -> the allowed tests are : local-loop remote-loop