Northern Telecom DNC-50 Maintenance And Troubleshooting Manual page 38

Dynamic network control systems
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32 Troubleshooting and Fault Clearing Procedures
(8)
(9)
(10) At any level in the hierarchy, you can access details of a selected item
(11) To leave the Maintenance Service, press the <Exit> softkeys until you
Practice 450-1011-501
To check the status of SRUs in cabinet 2, press <Next Cabinet>. You
can page forwards and backwards through the cabinets using <Next
Cabinet> and <Previous Cabinet>.
From any of the Cabinet screen displays, you can move to a lower level
in the screen hierarchy to view the status of each PRU in a selected
processor SRU, or the equipment connected to each port of a LANlink
SRU. To move to the lower level, select the appropriate SRU, and then
press <Next Level>.
Note: The Site Records (450-1011-152) show the assignments of
Meridian M4000 terminals, personal computers, and LAN Interface
Units (LIUs) to the LANlink SRU ports, and the assignment of PRUs
to the processors.
by pressing <Item Details>.
Several other softkeys are also provided throughout the Maintenance
Service. To access these softkeys, press <More Softkeys>:
<Courtesy Down> is used to take the unit out of service. It
provides two further softkeys, <Down Only>, which takes the unit
out of service, and <Down and Switch>, which takes the unit out of
service and switches the function to another, predesignated SRU.
If the unit has a status of 'Faulty', it is already out of service.
<Put Into Service> puts the unit back into service. This command is
typically entered after some corrective action has been taken. If the
unit still has a fault, its status will register as 'Trouble' or 'Faulty'.
<Diagnose> causes the system to run a diagnostic for the selected
unit. The test will take the unit out of service. At the end of the test,
the status will register 'Test OK' or 'Faulty'. If 'Test OK' is
displayed, you can put the unit back into service. (If the device
does not have diagnostic capabilities, a message to that effect
appears on the screen.)
arrive at the System Administrative Services Main Menu.

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