Maintenance; General; Maintenance Objectives; Maintenance Terminal - Mitel SX-200 Practices

6
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MAINTENANCE
General
6.1
This section briefly describes the maintenance diagnostics for the SX-200 DIGITAL
,PABX. These diagnostics test the operation of the system hardware. The Main
Control system has the responsibility of controlling and scheduling the diagnostics.
Upon power-up or reset conditions, the diagnostics software (if enabled) has
temporary control of the entire system. Once the system has been verified and the
PABX is operational, the diagnostics run as low priority background tasks.
Modular design and functional packaging of the equipment permits rapid location and
replacement of defective components. Circuit malfunctions are detected by diagnostic
routines automatically initiated by the Main Control Card (MCC). Diagnostic routines,
detailed in Practice 9109-096-353-NA, General Maintenance Information, and
Practice 9109-096-350-NA, Troubleshooting, direct service personnel to the
defective circuit card or assembly, and identify the required field-replaceable unit.
Diagnostic routines and maintenance procedures do not interfere with users
unaffected by the malfunction.
Maintenance Objectives
6.2 The objectives of the maintenance routines are to isolate a fault to a replaceable card
or module. Maintenance functions can be performed from either the Attendant
Console or an RS-232 terminal.
RS-232 Maintenance Terminal
6.3 The Main Control system interfaces to an RS-232 Maintenance Terminal and to the
Attendant Console in order to enable the user to access the diagnostic menu. The
diagnostic menu will direct the user through the required procedures in order to
interrogate the status of the diagnostic subsystem. The user can initiate maintenance
routines with specific parameters via the terminal. Refer to Practice
9109-096-351 -NA, RS-232 Maintenance Terminal. Results can be routed to the
appropriate device (printer or terminal) according to the user's instructions,
Diagnostic log Files
6.4 A file of the major occurrences in the diagnostic system is maintained on disk and/or
in non-volatile RAM. This file can be directed to the RS-232 Maintenance Terminal,
the Attendant Console, or a printer.
910949&10&NA
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100 6-l