3JF-2
2-2-6
Connector
Pin No.
Signal
I/O
Voltage
Description
21
22
1
CN1
2
MCN1
MCN2
4
3
2
1
6
5
Figure 2-2-4 NCU PCB silk-screen diagram
CN1
Connected
to the fax
control
PCB.
1
RXIN
O
Analog
RXIN signal
2
MODRXD
O
Analog
MODRXD signal
3
_RNGDET
O
3.3/0 V DC
Ring signal
4
MODTXD
I
Analog
MODTXD signal
5
_ONHOOK1
O
5/0 V DC
_ONHOOK1 signal
6
_ONHOOK2
O
5/0 V DC
_ONHOOK2 signal
7
_OFFHOOK
O
3.3/0 V DC
_OFFHOOK signal
8
NCUTYPE1
-
Open
Destination identification signal 1
9
NCUTYPE2
-
Ground*
1
/Open*
2
Destination identification signal 2
10
NCUTYPE3
-
Open*
1
/Ground*
2
Destination identification signal 3
11
TELSEL
I
3.3/0 V DC
TELSEL signal
12
FAXSEL
I
3.3/0 V DC
FAXSEL signal
13
PLSDIL
I
3.3/0 V DC
Dial pulse signal
14
EARTH
I
3.3/0 V DC
EARTH signal
15
DCCONT
I
3.3/0 V DC
DCCONT signal
16
SHUNT
I
3.3/0 V DC
SHUNT signal
17
N.C
-
-
Not used
18
N.C
-
-
Not used
19
5V
I
5 V DC
5 V DC supply
20
GND
-
-
Ground
21
12V
I
12 V DC
+12 V DC supply
22
GND
-
-
Ground
*
1
For 120 V specification. *
2
For 220 - 240 V specifications.