3JF-1
2-2-4
Connector
Pin No.
Signal
I/O
Voltage
Description
1
+12V
O
12 V DC
+12 V DC power supply
2
A.G
-
-
Ground
3
5V
O
5 V DC
5 V DC supply
4
S.G
-
-
Ground
5
EXTRING1
-
-
Not used
6
EXTRING2
-
-
Not used
7
KMUTE
O
3.3/0 V DC
KMUTE signal
8
SHUNT
O
3.3/0 V DC
SHUNT signal
9
PLSDIL
O
3.3/0 V DC (pulse)
Dial pulse signal
10
EARTH
O
3.3/0 V DC
EARTH signal
11
TELSEL
O
3.3/0 V DC
TELSEL signal
12
FAXSEL
O
3.3/0 V DC
FAXSEL signal
13
NCUTYPE2
-
Ground
*1
/Open
*2
Destination identification signal 2
14
NCUTYPE3
-
Open
*1
/Ground
*2
Destination identification signal 3
15
_OFFHOOK
I
3.3/0 V DC
_OFFHOOK signal
16
NCUTYPE1
-
Open
Destination identification signal 1
17
_ONHOOK1
I
5/0 V DC
_ONHOOK1 signal
18
_ONHOOK2
I
5/0 V DC
_ONHOOK2 signal
19
_RNGDET
I
3.3/0 V DC (pulse)
Ring signal
20
MODTXD
O
Analog
MODTXD signal
21
RXIN
I
Analog
RXIN signal
22
MODRXD
I
Analog
MODRXD signal
1
BEEP
O
Analog
Speaker sound output
2
AGND
-
-
Ground
1
+2.4V-NIMH
I
2.4 V DC
Backup 2.4 V DC power supply input
2
GND
-
-
Ground
YC2
Connected
to the NCU
PCB.
YC3
Connected
to the
speaker.
YC4
Connected
to the
backup
battery.
*
1
For 120 V specification. *
2
For 220 - 240 V specifications.