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A. Accessing the SO-24A
The SO-24A provides balanced 40V talk battery with dial tone on the observing wire pair. A manager or training
supervisor may access the SO-24A observing port dial tone from an unused trunk input on any PABX/KSU or via
a dedicated Touch Tone phone. The SO-24A may also be remotely accessed through the RAD-AMP Remote Ac-
cess Devices, for more information on the RAD-AMP, see DOD# 415.
B. Selecting a Line or Station
Once the observing port is accessed, dial any of the twenty-four to two hundred forty lines or stations by dialing
the two, three or four digit dial up code programmed to that station (see Installation chart). Nothing can be heard
by the station being observed. Another station may be selected by dialing a "#" followed by another two, three or
four digit dial up code. You may also hang up and then re-access the observing port to dial another dial up code.
C. Talk Assist
Though the SO-24A monitors silently, a manager may enter the conversation to provide assistance at any time
by dialing a "Q." To prevent accidental interruptions, this feature may be disabled (see Programming section E).
D. Manually Controlled Digital Recording
A remotely controllable digital recorder may be started and stopped when interfaced with the SO-24A using the
provided cables (see Installation). To start the recorder, dial a Touch Tone "9." To stop the recorder, dial a Touch
Tone "#" or hang up.
E. Automatic Tape Recording
Set DIP switch 3 to ON (see Programming section A) and all monitored conversations will be recorded. If a multi-
module system (Master and Slaves) is installed, set DIP switch 3 on all modules to ON.
F. Status LED
The status LED will turn off when a Touch Tone is present from the observing phone, and will wink once per second
while observing a station.
G. Quick Operation Guide
Description
To select another line or station ........................................................................................... # + new dial up code
To join conversation using talk assist feature ....................................................................... Q
To manually start recorder .................................................................................................... 9
To stop recorder ................................................................................................................... # or hang up
To discontinue observing ..................................................................................................... Hang up
A. Remote Observing
The SO-24A may be used remotely by adding the RAD-AMP to the monitoring output. Important: When using
this combination, the SO-24A dial up codes can NOT begin with the number 7. This is because "#7" is the hang-
up command for the RAD-AMP.
13.8V AC
Adapter
VIKING
(included)
SERVICE OBSERVING UNIT
POWER
13.8 VAC
STATUS LED
MULTI-UNIT
TAPE RECORDER
COMMUNICATIONS
CONNECTIONS
RECORD
AUDIO
CONTROL
OUT
INPUT
OUTPUT
6
MODEL SO-24A
©
VIKING
ELECTRONICS
HUDSON, WI 54016
24 LINE
MASTER
PROGRAM
RECORD CONTROL
RJ21X
1 2 3
LINE / STATION CONNECTIONS
ON
OUT
OFF
OFF
RJ21X Male Jack
(not included)
Applications
24 Analog
PABX/KSU
C.O. Lines
Stations
or
Punch Down Terminal
Block with Split Center
(not included)
Emerson # 66M1-50
Siemon # 66M150
Suttle # SE-66M1-50-C5
Bridge Clip the First 24 Pairs
To 24 Monitored
Stations or Phones
Remote
Observing
Phone
C.O.
Line
Pins 25 & 50 Tip (V/S)
and Ring (S/V)
Enter Digits
RAD-AMP Remote
Access Device
LINE IN
LINE OUT
USE ONLY LISTED
CLASS 2 POWER
REMOTE
SOURCE 12V DC
500mA MAXIMUM
SWITCH
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