Control Port Operation HDSL4 for General Distribution Installation and Maintenance Practice30 61223HDSL4L2-5CNOTEThe T1 alarm indications displays if the External Alarms option isset to “Enabled” on the Provisioning menu (Figure 17).The Auto In Service Status screen also indicates the startup or exit period remaining as either1, 4, 8, or 24 hours. This is the time during which the unit monitors both loop synchroni-zation (Loop Sync) and T1 alarms (if enabled) and only goes into (or out of) service if the circuitremains synchronized and without T1 alarms during the entire measured period. These timesare also set from the Provisioning menu.A link is provided to view the Alarm History Screen. The Alarm History Screen screen is alsoavailable by selecting the HDSL4 Main Menu option.System responses displayed in the status fields on the Alarm History Screen are shown inTable 10.Table 10. Auto In Service Status IndicationsStatus Field Name System IndicationsCurrent Auto In Service State (line 1) In ServiceOut-of-Service MaintenanceAuto In Service Status (line 2) Currently in startup periodCurrently in exiting periodOK, Startup Period COMPLETEDOK, Startup INCOMPLETE (forced in-service)Auto In Service Criteria (line 3) DSL Loop Sync (T1 alarms ignored)DSL Loop Sync and absence of T1 alarmsCriteria (current status) DSL Loop Sync = OK or LOS (LOS shown in Figure 22)T1 Alarm Status = Alarm or OK
