Accessing The Maintenance Service In Sas - Northern Telecom DNC-50 Maintenance And Troubleshooting Manual

30 Troubleshooting and Fault Clearing Procedures
Table 3-A Continued
Summary of Fault Symptoms and Potential Solutions
SYMPTOMS

Accessing the Maintenance Service in SAS

Detailed information on the Maintenance Service is provided in the Guide to
System Administrative Services, 450-1011-301. You can enlist the assistance
of the system administrator when identifying faults.
Alternatively, you can request access to System Administrative Services so
that you can perform the troubleshooting procedures yourself. In this case,
you should use 450-1011-301 as a guide. However, you may use the
following procedure as a short-form guide to the SAS Maintenance Service.
(1)
(2)
(3)
(4)
(5)
Practice 450-1011-501
PROBABLE CAUSES
At the system administrator's terminal, type the system administrator's
ID and press ENTER. (This step assumes that you have arranged with
the system administrator for access to System Administrative Services.)
You will be prompted for a password.
Type the system administrator's password. If the password is correct,
the Main Menu will be displayed.
Use the cursor control keys to move the cursor to System Administrative
Services. If System Administrative Services is not displayed on the first
page of the Main Menu, press <Next Page> to page forward to the
appropriate screen.
With the cursor highlighting System Administrative Services, press
ENTER. The menu of System Administrative Services is displayed.
Again using the cursor control keys, select Maintenance from the SAS
menu, then press ENTER. The Faulty Units screen of the Maintenance
Service is displayed.
The Faulty Units screen shows only those devices that the system's self-
diagnostics have determined to be faulty. These may include shared
resource units (SRUs), remote resource units (RRUs), and program
resource units (PRUs). This screen is shown first on entering the
Maintenance Service to provide a summary list of faulty units that the
system has taken out of service.
CORRECTIVE ACTIONS
Normally, the PRU goes from the
'Preload' state to 'Loading', and then
to 'Working'. If the PRU goes quickly
from 'Preload' to 'Faulty', it cannot
find software that it requires to
operate.
If a PRU goes out of service
repeatedly, contact NT field support.