Sharp FO-CC500 Service Manual page 61

5. CI detection circuit
•
CI is detected by the photo coupler which is integrated in series in
the primary side TEL circuit well proven in the existing unit.
6. Signal/DTMF transmission level & receiving level
•
Signal transmission level setting: According to soft switch list.
•
DTMF transmission level setting: According to soft switch list.
4) Signal selection
The following signals are used to control the transmission line of TEL/
FAX signal. For details, refer to the signal selector matrix table.
[Control signals from output port]
Signal Name
CML Line connecting relay and DP generating relay
H: Line make
(The circuit is located
L: Line break
in the LIU PWB.)
SP MUTE Speaker tone mute control signal
H: Muting (Power down mode)
(The circuit is located
L: Muting cancel (Normal operation)
in the LIU PWB.)
Handset reception mute control signal
TELMUTE H: Muting
L: Muting cancel
VOLUME SETTING
Key buzzer volume setting Fixed
Speaker volume setting Level1
Level2
Level3
Level4
Level5
Ringer volume setting Low
Middle
High
DTMF speaker volume Level1
setting Level2
Level3
Level4
Level5
OGM playback speaker Level1
volume setting Level2
Level3
Level4
Level5
ICM record speaker Level1
volume setting Level2
Level3
Level4
Level5
Description
LINEOUT A RCVOL DTME VOL A VOL B
(HIGH) (LOW) MUTE
VOL C
1 1 1
0 1 1
0 0 1
1 1 0
0 1 0
1 0 0
1 1 1
0 0 1
0 0 0
1 0 1
1 0 1
1 0 1
1 0 1
1 0 1
0 0 1
1 1 0
0 1 0
1 0 0
0 0 0
0 0 1
1 1 0
0 1 0
1 0 0
0 0 0
5 – 11
FO-CC500A
FO-K01A