Mitel SX-200 Documentation page 734

SECTION MITL9105/911 O-096-500-NA
4.42
Power
Fail Transfer Control Switches. These switches are
used to determine the source of a power fail transfer. Power fail
transfer will occur whenever a Major Alarm occurs. A Major Alarm may
be caused by a common control failure, a power supply failure, or by
the operation of a failure transfer switch on one of the consoles. The
power fail switches have two positions: ENABLE and DISABLE. When
set to ENABLE, the system allows power fail transfer to be initiated
from the designated source. When set to DISABLE, the designated
source cannot initiate power fail transfer; e.g., with the COMMON
CONTROL power fail transfer control switch set to ENABLE, a common
control failure will cause a power fail transfer. The MASTER power fail
transfer switch will set the system to power fail transfer when op-
erated to the TRANSFER position. For regular operation, this switch
should be set to NORMAL. The switches associated with a console
must be set to disable when that console is not in use.
4.43 Test Line Terminals. The test line TIP and RING terminals may
be used in conjunction with a test set (butt-in) and the thumb-
wheel switches on the tone control card, to access individual speech
paths, receivers and trunks for test purposes. The test line also has the
capability of resetting system errors, busying out and debusying re-
ceivers and speech paths, and controlling the printer. See Part 5 for a
full description of the use of the Test Line.
H. Console
Alarm
LEDs and Maintenance Aids
4.44 Each Supervisor Console (Figure 4-5) is equipped with a num-
ber of maintenance aids and keys which are associated with
maintenance functions. The following paragraphs describe the function
of each LED and key.
4.45 Minor (MIN) Alarm LED.
This LED will flash whenever the
automatic diagnostics detect a malfunction which is not suffi-
ciently serious to cause a complete system failure. Typical examp!es
would include receiver malfunction, speech path malfunction and
crosspoint malfunction.
4.46 Console (CON) Alarm LED.
The Console Alarm LED flashes to
indicate a console malfunction. The LED will go off when the
alarm has been cleared or canceled.
4.47 Major (MAJ) Alarm LED.
This LED turns ON to indicate that a
malfunction has occurred which has caused the power fail
transfer relays to operate:
0
When the MAJ Alarm LED is ON, the system is automatically in
power fail transfer mode.
0
Typical examples of major alarms include Scanner failure or
CPU malfunction.
l
The MAJ Alarm LED, unlike the other console LEDs, is hardwired
from the system cabinet to the console.
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