PART B - SWITCHBOARDS
9.
SB-993/GT manual telephone switchboard.
Status: STD-A; NSN: 5805-00-708-2202
General Information
The SB-993/GT is a lightweight, portable switchboard capable of handling six local-battery telephone
lines. It is designed for use in forward combat areas. It requires the use of either a local-battery
telephone or a sound-powered telephone (not a component).
Technical Characteristics
Type of Operation.................................................................. Manual with local battery
Line Capacity......................................................................... 1 operator line and 6 local-battery
circuits
Signaling (Outgoing) ............................................................ 90 V AC, 20 Hz
Signaling (Incoming)............................................................. 90 V AC, 20 Hz
Type of Signal .......................................................................Neon glow lamp
Power Requirement................................................................None
Weight ...................................................................................2.04 kg (4.5 lbs)
SS 0029
1-14
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