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UX-68DE
FO-78DE
5. Externally connected TEL OFF HOOK detection circuit section
•
The circuit current detection is turned on together with OFF HOOK
of main body or OFF HOOK of externally connected TEL. ON of
CML OFF (HS=L) is judged as OFF HOOK of externally connected
TEL.
6. CI detection circuit
•
CI is detected by the photocoupler which is integrated in series in
the primary side TEL circuit well proven in the existing unit.
5 – 10
Signal Name
Description
CML
Line connecting relay
(The circuit is located
H: Line make
in the TEL/LIU PWB.)
L: Line break
SP MUTE
Speaker tone mute control signal
(The circuit is located
H: Muting (Power down mode)
in the TEL/LIU PWB.)
L: Muting cancel (Normal operation)
Handset reception mute control signal
TEL MUTE
H: Muting
L: Muting cancel
DPON
Connecting DC circuit and DP generating
(The circuit is located H: Line connect / Make
in the TEL/LIU PWB.)
L: Line disconnect / Break
DPMUTE
Adjust the resistance during make ratio
(The circuit is located H: Muting
in the TEL/LIU PWB.)
L: Muting cancel
TXMUTE
Tx route mute circuit
(The circuit is located H: Muting
in the control PWB.)
L: Muting cancel
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]
VOL A
VOL B
VOL C
ON-HOOK ICM/OGM ICM/OGM
OUTPUT
VALUE
(GP02)
(GP03)
(GP04)
Receiving MONITOR
PLAY
RINGER
BUZZER DTMF/DP
X 0
1K
0
0
0
—
—
HIGH
HIGH
—
—
X 1
10K
1
0
0
HIGH
HIGH
MIDDLE1
—
—
—
X 2
39K
0
1
0
MID 1
MID 1
MIDDLE2
—
—
—
X 3
100K
1
1
0
MID 2
MID 2
MIDDLE3
—
—
—
X 4
200K
0
0
1
MID 3
MID 3
LOW
MIDDLE
—
—
X 5
300K
1
0
1
—
—
—
—
—
FIXED
X 6
470K
0
1
1
LOW
LOW
—
—
FIXED
—
X 7
750K
1
1
1
—
—
—
LOW
—
—
VOLUME SETTING
Содержание FO-78
Страница 6: ...UX 68DE FO 78DE M E M O 1 9 ...
Страница 27: ...UX 68DE FO 78DE 2 21 M E M O ...
Страница 49: ...UX 68DE FO 78DE Control PWB parts layout Top side 6 7 ...
Страница 50: ...UX 68DE FO 78DE Control PWB parts layout Bottom side 6 8 ...
Страница 53: ...UX 68DE FO 78DE TEL LIU PWB parts layout Top side 6 11 ...
Страница 54: ...UX 68DE FO 78DE 6 12 TEL LIU PWB parts layout Bottom side ...
Страница 58: ...UX 68DE FO 78DE 6 16 M E M O ...