Specifications for the multiplex printing telegraph system : theory and operation (1920)
Western Union Telegraph Company · [New York?] : The Company · leaf 18
spond to the signals made on thehome key. 9. So far we have considered two working conditions of the duplex, as follows: (1) the case of spacing signals being sent from both stations; that is, both the home anddistant keys at rest, as per Figure 3; (2) the case of a marking signal; i. e., a dot ora… … ML= LINE WIRE=I550 (6)—- NO CURRENT 80 V. GENERATOR
Telegraph
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