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C. Expanding the SO-24
A second SO-24 can be added, allowing 48 lines/stations to be monitored from a single observing phone. Assign
the first SO-24 as the low group and the second SO-24 as the high group (see Programming). The two observing
ports may be connected in parallel.
#1 Low Group
(Dip Switch 1 OFF)
VIKING
SERVICE OBSERVING UNIT
MODEL SO-24
1
2
3
4
POWER
VIKING ELECTRONICS, INC. HUDSON, WI 54016
Important: To keep polarity of balanced battery feed correct, connect V/S
from each unit together, and S/V from each unit together.
D. Remote Access of the SO-24
The SO-24 Service Observer can be accessed remotely by using Viking's RAD-AMP Remote Access Device. The
RAD-AMP is recommended and features amplification to increase the decibel level. For more information on the
RAD-AMP, retrieve Fax Back Documents 415.
Amplified Remote Access Device
©
Lines 1-24
Lines 25-48
PABX/KSU
Trunk Port
RAD-AMP
#2 High Group
(Dip Switch 1 ON)
VIKING
SERVICE OBSERVING UNIT
MODEL SO-24
1
2
3
4
POWER
VIKING ELECTRONICS, INC. HUDSON, WI 54016
V/S, S/V
From
High Group
V/S, S/V
From Low Group
SERVICE OBSERVING UNIT
1
2
3
4
POWER
Pins 50/25
V/S, S/V
©
Training Supervisor
VIKING
©
MODEL SO-24
VIKING ELECTRONICS, INC. HUDSON, WI 54016
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