Maintenance4-53160-A2-GB21-80 March 1999Table 4-2. Device Health and Status Messages (2 of 2)Message DescriptionTest in progress A test is currently active. Select Tstat (in the Stat branch) to displaymore test information.ModemConnectedThe integral modem is currently connected. This message is onlydisplayed for standalone DSU/CSUs.Master Clk fail The master clock has failed. Timing for the DSU/CSU is providedby the internal clock.DSU Operational This message only appears if there are no valid alarm or statusmessages.Performance ReportsWhen the network interface is configured for ESF operation, networkperformance is continuously monitored and maintained in two sets of aggregateregisters: Carrier Network Interface Registers (Telco) and User Network InterfaceRegisters (User). The User registers contain an extra status register (StatusEvent). Registers shown on the front panel LCD are listed in Table 4-3. Theseregisters are status registers that collect performance data for the previous24-hour period. Performance data is updated in 15-minute intervals. After15 minutes, the current interval is rolled over into a set of accumulator registersthat represent the previous 96 15-minute intervals for the register. An intervaltotal of how many of the 96 registers contain valid data is also kept, as well as a24-hour total for each accumulator register.For 2-port and 4-port DSU/CSUs, port performance is continuously monitoredand maintained in memory registers when the port is configured to use EDL. TheDSU/CSU maintains two sets of port registers for each synchronous data port:far-end port registers and near-end port registers. These registers are statusregisters that collect performance data for the previous 8-hour period. Port data isupdated in 15-minute intervals. After 15 minutes, the current interval is rolled overinto a set of accumulator registers that represent the previous 32 15-minuteintervals for the register. An interval total of how many of the 32 registers containvalid data is also kept, as well as a 8-hour total for each accumulator register.NOTE:The following procedure is an example only. Screen displays may varydepending on the model and configuration of the DSU/CSU. Theprocedures for displaying Telco and port registers are similar to this example.
