7. Operation and Maintenance7-74 September 2002 9128-A2-GB20-80Verifying ISDN LinesUse either of the following methods to verify operation of the ISDN lines. Check the status of the DBM interface:Main Menu →Status→DBM Interface StatusLine Status should display Active. If an invalid (Inv) status appears (e.g., InvSPID for an ISDN BRI DBM) in the Line Status field, verify that you enteredISDN physical options correctly. Check the status of the unit:Main Menu →Status→System and Test Status→Health and Status columnSystem Operational should appear.If ISDN Network Failed appears, check that both ends of the ISDN cableare seated properly for a good physical connection. If that does not clear themessage, verify that you entered ISDN physical option information correctly,then contact the network service provider.SeeDBM Interface Status on page 7-38, and Table 7-8, Health and StatusMessages, for additional status information.Verifying That Backup Can Take PlaceAs each remote site is installed, verify its backup operation by unplugging thenetwork cable so the system is forced into backup. Verify the ISDN lines by checking the DBM Interface Status.Main Menu →Status→DBM Interface StatusLine Status should be Active. If an invalid (Inv) status (e.g., Inv SPID) isdisplayed, verify that you entered ISDN physical options correctly. Check backup setup and that data can be passed between DBMs. Reconnect the network cable.See Table 7-8, Health and Status Messages,Viewing LEDs and Control Leads onpage 7-4, andDBM Call Performance Statistics on page 7-67, for additionalinformation.
