Oki B4100 User Manual
Page 446
40055101TH Rev.4
446 /
3
.
Explanation
on
CN3
Terminals
CN3
Terminal
Explanation
U N C
W N 5
DN5
FN5
pin
No.
name
(US.CA)
(INT’L)
D.A.CH)
(F.UK)
1
REV2
Detection
and
output
of
the
direction
of
DC
∗
∗
∗
∗
line
current.
2
OH2
Detection
of
off-hook
of
terminal
connected
to
TEL-1
or
TEL-2.
3
OH1
Output upon circuit current detection
∗
∗
∗
∗
after fax line seizure
4
RI
0
-
5
V
signal
output
synchronized
with
the
ringing
signal
frequency
5
N C
Unused
terminal
∗
∗
∗
∗
6
PP
Relay
control
signal
for
special
service
code
detection
at
parallel
pickup
or
remote
reception
7,
8
E
G N D
9,
10
sub + 5 V
Sub
power
supply
for
OH2
and
RI
detection
11,
12
+ 5 V
Power
supply
for
relays
and
logic
circuits
13,
14
+ 5 VA
+5
V
power
supply
for
analog
circuit
∗
∗
∗
15,
16
S
TX
Signal
17,
18
– 5 VA
–
5
V
power
supply
for
analog
circuit
∗
∗
∗
19,
20
R
RX
Signal
21,
22
SG
Signal
ground
23,
24
Rp
Receiving
sensitivity
determination
terminal
25
DP
Pulse
dial
control
signal
26
C M L
Line
seizure
control
signal
27
F.
ICC
Loop
current
control
signal
upon
line
seizure
∗
∗
∗
28
SR
Control
signal
for
connection
between
LINE
and
TEL
terminals
29
PBXE
Control
signal
for
connecting
one
of
LINE
∗
∗
∗
terminal
to
the
PBXE
terminal
30
M U T E
Control
signal
for
pulse
dial
improvement
and
∗
bell
shunt
relay
Note
*:
Unused.