Multiplex communications – Wide area network – Packet switching
Patent
1981-01-27
1983-08-09
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370100, H04J 306
Patent
active
043982883
ABSTRACT:
The periodicity of an input signal is monitored by means of a re-triggerable one-shot multivibrator. When an input signal interruption is detected by the output of the multivibrator, the state of the input signal interruption is held to interrupt the transmission until a phase locked loop is demodulated. The transmission is not opened until the phase locked loop is brought into its synchronous state.
REFERENCES:
patent: 3651408 (1972-03-01), Miller
patent: 3863220 (1975-01-01), Osawa et al.
patent: 4064486 (1977-12-01), Faber
patent: 4136384 (1979-01-01), Okada et al.
Mizokawa Sadao
Takahashi Masahiro
Yasumoto Seiichi
Hitachi , Ltd.
Olms Douglas W.
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