GEC 880 Service Manual
SERVICE MODE
1.2/0111
11
SERVICE MODE
The call station is in
USER MODE
after booting. Via a special key combination unknown to operators
you can enter the so-called
SERVICE MODE
, where more settings than in
USER MODE
can be
applied. All settings are entered via the keyboard.
Via the key combination
+
+
(press simultaneously with key
first – easily to be remembered
– because situated in a diagonal row) you can switch to
SERVICE MODE
and back to
USER MODE
.
As long as the call station is in service mode, each of the 6 digits of the display will show a dot (e.g.
S.T.D.B.Y.
instead of
STDBY
).
With the key
it is possible to scroll through the list of parameters. With the keys
and
the value
of the individual parameters can be changed.
Parameter
Description
Value
range
Default
value
ACK
Acknowledgement tones ON/OFF (“keypad tones”)
0 = OFF
1 = ON
0
AEC
Noise surpression
0 = service side OFF, client side OFF
1 = service side ON, client side OFF
2 = service side OFF, client side ON
3 = service side ON, client side ON
3
ALM
Sabotage alarm
0
ANK
Automatic switch off
time
0= OFF
1-30 = automatic swich off time (s)
0
BEL
Ring tone for contact
0 = OFF
1 = make
2 = break (contact)
1
GNG
Call gong
0 = OFF
1 = ON
1
LCD
Adjustment of LCdisplay contrast
1...10
5
LED
Brightness of the LED
1...10
5
MAX
Mode of the AUX output
0 = AUX OFF
1 = AUX reflect service side
2 = AUX reflect user side
3 = AUX reflect both sides
0
MEX
Amplification outside microphone
Increase in 0.5 dB steps
0...127
MIC 480
90
Q400 v2.0 (AGK)
90
Q400 v1.0 (Peiker)
102
X-MIC 473 (Schwanenhals)
96
MHS
Amplification headset microphone
75
NLP
NLP (Non-linear Processor) + AHC (Anti-howling control)
0 = NLP OFF; AHC OFF
1 = NLP ON; AHC OFF
2 = NLP OFFs; AHC ON
3 = NLP ON, AHC ON
3 (may not be
changed)
SZE
Size of speaking zone of external microphone
0 = limit OFF
1 = limit approx. 2,5m (8.2 ft)
9 = limit approx. 25 cm (9.8 in)
5
SZI
Size of speaking zone of internal microphone
5
VAX
Volume AUX-output*
0...10
10
VCE
Volume of the tones in the outside zone (call gong, alarm tone)
0...10
5
VCI
Volume of the tones at the inside station (keypad tones, ring
tone, alarm tone)
1...10
5
VEB
Volume of external speaker in BOOST Mode
1...13
8
VEX
Volume of external speaker
1...13
8
* for connection to Audiocom