Panasonic KX-T336 System Reference Manual page 1531

A. Introduction
This section describes the information necessary
for monitoring, testing, and maintaining the
system using a Dumb terminal.
The modular self-testing capabilities of the
system allow most maintenance to be reduced to
simple procedures.
You can administer the system programming and
perform maintenance using VT220(100),
Compatibles, Dumb terminal and Attendant
Console.
Only one terminal can be performing system
administration at any one time.
Changing the System Administration Device is
done in programming.
To execute the change, the user must exit
system administration mode and then reenter
system administration mode.
(Note)
The following subsections are defined in Section
14.
C. Device Status
2.00 Definition of Operating Status
2.01 Shelf, Slot, Resource
2.02 Port
2.03 Interactions among Devices
2.04 Changes of the Shelf Status
2.05 Changes of the Slot Status
D. Self-Test (System-Detected Troubles)
2.00 Clearing System-Detected Troubles
2.01 Consulting the Error Log
E. Troubleshooting Guide
15-A-1