P
AGE
4
00330-1199 <90-00045>
F
IG
. 2 - F
UNCTIONAL
S
CHEMATIC
, DTSS3A
INSTALLATION
UPDATED
P1
Audio
V
isual
Ext Spkr
. Control
K1
K1
Ext.
Auto.
1 2 3 4
A B C D
13
1
2
4
6
3
9
20
12
Buzz
Interrupt 2 on / 4 of
f
Ring Back
Tone
49920
Common Interrupt
Supply Module
J1
13
11
14
17
19
27
12
37
21
Buzzer
4W Xmt
4W Rcv
RGBK T
one
Interrupt
29
41 47
2 4
34
30
51
53
7
13
42
10
Bridging
All
Call
Gp Call
Pwr-up
Clear
Gnd
Talk
Batt.
-V
R.G In 31
35
25
17
23
39
26
3
28
Reset
Out
10
5
78
Port of Common Interrupt Supply
Headset
Jack
Phone
Jack (J4)
P3-1
P3-2
Busy
Rst In
49018
or
49028
4 12 3 14
Reset In
Ring Start
Pwr-up Clear
Gnd
-V
35
17
39
13
15
8
7
44020 DTMF Decoder Module
J3
Gnd
( - )
J6
J1-18
J1-16
Power -22 to -56 VDC
D1
J5
55
49
Ring Enable
Sta 1 Out
Pwr-up Busy
Sta 2 Out
-16 dBm
+7 dBm
12
5
External Speaker
Lamp (50 mA
max)
P1
44022 Station Interface
J2
Bypass
Bridge Bypass Switch
Bridge
A
B
C
D
S1
In
1
Out
In
4
Out
In
3
Out
Out
2
In
Direct Output Port
Input Port
Output Port
Auxiliary
Port
Input Port
Termination
P1
14
Xmt
15
16
17
Rcv
+7
-16
P2
10
Xmt
9
8
7
Rcv
+7
-16
P2
2
Xmt
1
3
4
Rcv
+7
-16
P2
12
Xmt
11
5
6
Rcv
+7
-16
Resistive Bridge
T
R
T1
R1
T
R
T1
R1
T
R
T1
R1
T
R
T1
R1
S2 Aux
Port
Termination
Out
In
In
S3 Input Port
Termination
In
In
In
Out
J7
P1
6
7
10
11
8
9
2W/4W XMT
RCV DROP
(Note 1)
(Note 4)
(Note 4)
(Note 2)
(Note 3)
(Note 4)
NOTES: 1. Remove J6 for floating chassis ground. 2.
To
use external ringing generators, remove J5 and connect to pin 31 of the 44022-10.
3. Speaker return pair goes to pin 7. 4.
To
hook up phone with lamp and buzzer
, add jumpers from P3-2 to J2-17 and from P3-1 to J2-29.
K1
