DSS CONSOLE TESTS:
3.6.48
1.
2.
3.
4.
Check wiring to DSS station and DSS console.
5.
Test DSS station using station test.
3.6.49
2.
3.
4.
3.6.50
1.
3.6.51
1.
3.6.52
Override DND:
3.6.53
1.
2.
3.6.54
3.6.55
1.
2.
DSS Call:
If a station is not connected, is faulty or is busy, then the associated DSS console LED will
not light and busy tone will be heard when the DSS console key is depressed. (The DSS
console is always busy).
If the DSS console has keys or
which don’t function, replace the DSS console.
Check that the DSS console is correctly installed.
DSS console is installed at DSS station number plus one with a 1 AMP 3AG fuse on
corresponding ESTB board.
Switches on ECMB board are as follows:
SW3 First DSS station.
SW2 Second DSS station (set to “all l’s” if not equipped)
SW1 On
switch)
Background Noise:
Check called station using station test.
Double tone burst, but no background noise is heard if station
Microphone-off.
is in Do Not Disturb or
Check microphone connection in station is RD to Ml, WT to M2.
Replace called station.
DSS Console:
Replace DSS Console.
Call Override:
Follow the test instructions exactly: It is only possible for the DSS to override station B
while it is in handsfree mode (its DSS console LED is flashing). If it is attempted to override
station A or station B while using its handset, then off hook signalling will result.
Check the system programming for station B, DND enabled.
Overriding DND:
Check system programming data for DSS override of DND.
If override is programmed, then station B should receive an intercom call with microphone
off.
Message Waiting:
Replace station A.
Night Transfer:
Check system programming data for night transfer.
Check that stations assigned to night transfer operate (station test).
MISCELLANEOUS TESTS:
3.6.56
Powerfail Stations:
1.
Check that A-pair voltage (BL to WT) is approximately 50V station on hook. If not replace
EPFB board.
2.
Check wiring on SDF block for powerfail station.
3.
Confirm that station operates with power on (station test).
4.
Replace powerfail station.
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ISSUE 1