System for preventing stealing of line in radiotelephony

Details System for preventing stealing of line in radiotelephony System for preventing stealing of line in radiotelephony

1984-05-09

1986-10-14

Lev, Robert G.

179 2EB, H01Q 704

Patent

active

046174249

ABSTRACT:
A subsidiary telephone set successively transmits first and second pilot signals to a master telephone set. The master telephone set receives the first pilot signal to be brought in a standby state and subsequently receives the second pilot signal to be connected to a telephone line. Consequently, telephone communication is enabled.

REFERENCES:
patent: 3366880 (1968-01-01), Driver
patent: 3586787 (1971-06-01), Vogelman et al.
patent: 4291197 (1981-09-01), Yonaga
patent: 4332981 (1982-06-01), Palombi et al.

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