Chapter 7. Test Menu7-10 TSU 120 User Manual 61202129L1-1DBU Loopback (TSU 120e only)DBU Test (TSU 120e only)This selection is used to force a backup to occur even if abackup condition does not exist.DBU DATA/CNTRL (TSU 120e only)Allows status of DCD and RI to be monitored while theINTERFACE TST is on. If the dial-up network is correctly config-ured and dialed up, there should be an asterisk (*) over DCD.DBU TST RESULT (TSU 120e only)When an interface test is active, this screen will show the totalnumber of DATA BLOCKS received and the number of blockswith errors.Port Test Menu Items for 0.2 DSX-1LoopbackLoopback activates the loopback function on the base DSX-1interface. The available loopbacks are Port Loopback (towardsthe NI) and Line Loopback (towards the PBX or other terminalequipment).Cancel TestsUse this menu selection to deactivate all active tests, includingtests on option modules.ON Initiates a loopback from the DBU towards theexternal DCEOFF Terminates the loopback testTest Name What it does...TEST OFF Turns off DBU testsFORCEDBACKUPForces a backup regardless of time-of-daylockouts or network conditionsINTERFACETESTCauses the external DCE to dial its storednumber. After the connection is established,the DBU sends a test pattern to verify thebackup network. This test does not disruptdata or the primary network.
