page 7 – 6
220 / March 2000
S U P E R P H O N E I N P U T
Audio and Control Connections (lower DB-25 “B” Connector)
These include outputs to the station hybrid, module output composite
feeds (for recording) and remote tape machine START/STOP ports.
Pin 25 – Composite Out SH
Pin 24 – Composite Out HI
Pin 12 – Composite Out LO
Pin 11 – Composite Minus Callers Out SH
Pin 10 – Composite Minus Callers Out HI
Pin 23 – Composite Minus Callers Out LO
Pin 22 – Callers Only Out SH
Pin 21 – Callers Only Out HI
Pin 9 – Callers Only Out LO
Pin 8 – To Hybrid 1 Out SH
Pin 7 – To Hybrid 1 Out HI
Pin 20 – To Hybrid 1 Out LO
Pin 19 – To Hybrid 2 Out SH
Pin 18 – To Hybrid 2 Out HI
Pin 6 – To Hybrid 2 Out LO
Pin 17 – Start/Stop Common
Pin 16 – Stop
Pin 15 – Start
Pin 4 – Start/Stop Common
Pin 3 – Stop
Pin 2 – Start
The last six callouts are simply two parallel-connected sets of pins for the
same control port. When the module’s ON/START switch is pressed, a
closure takes place between start/stop common and START; when the
module’s OFF switch is pressed, a closure takes place between start/stop
common and STOP. These may be used to control a remote tape machine
for recording phone segments. These are opto isolated outputs. The Start/
Stop Common connects to the opto emitters, while Stop and Start connect
to the opto collectors. Observe correct polarity when using these outputs.
Typical DB-25
connector
9
10
11
12
13
22
23
24
25
6
7
8
19
20
21
4
5
16
17
18
1
2
3
14
15