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 TM 55-1905-223-10
Table 2-1. Description of Operator's Controls and Indicators - CONT
Key
Control or Indicator
Function
Sound Powered Telephone, Model SER (FIGURE 2-18)
1
Bell
Audible signal for incoming call.
2
Selector Dial
Outlines available stations.
3
Selector Knob
Selects station to be called.
4
Magneto Handle
Crank handle to call a station.
5
Handset
Communication instrument.
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