JPS6473919A - Living/standby switching type communication equipment - Google Patents

Living/standby switching type communication equipment

Info

Publication number
JPS6473919A
JPS6473919A JP22961887A JP22961887A JPS6473919A JP S6473919 A JPS6473919 A JP S6473919A JP 22961887 A JP22961887 A JP 22961887A JP 22961887 A JP22961887 A JP 22961887A JP S6473919 A JPS6473919 A JP S6473919A
Authority
JP
Japan
Prior art keywords
output
living
standby
takes place
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22961887A
Other languages
Japanese (ja)
Inventor
Mitsuyoshi Tsuboike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP22961887A priority Critical patent/JPS6473919A/en
Publication of JPS6473919A publication Critical patent/JPS6473919A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent an event due to production of electromagnetic coupling and interference noise when mechanical distance of each device is close to each other by switching plural reference oscillators and driving a load circuit used for all systems depending on the output of any reference oscillator. CONSTITUTION:If a fault takes place in a living set 1-1, an input signal switch 5 and an output signal switch 6 for the system 1 are switched by its fault occurrence signal, an input signal from the system 1 is inputted to a standby set 2 and an output signal of the standby set 2 becomes an output of the system 1. Simultaneously, the reference oscillator output switch 7 is controlled to select the standby reference oscillator 3 and the signal is fed in parallel with each load circuit 4. If a fault takes place in other living sets 1-2 1-N, the standby set 2 is controlled to be selected. Thus, even when each living set and standby set are mounted closely in terms of distance, no beat fault takes place due to the electromagnetic field coupling and interference noise of a low frequency is not superimposed on the output.
JP22961887A 1987-09-16 1987-09-16 Living/standby switching type communication equipment Pending JPS6473919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22961887A JPS6473919A (en) 1987-09-16 1987-09-16 Living/standby switching type communication equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22961887A JPS6473919A (en) 1987-09-16 1987-09-16 Living/standby switching type communication equipment

Publications (1)

Publication Number Publication Date
JPS6473919A true JPS6473919A (en) 1989-03-20

Family

ID=16895009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22961887A Pending JPS6473919A (en) 1987-09-16 1987-09-16 Living/standby switching type communication equipment

Country Status (1)

Country Link
JP (1) JPS6473919A (en)

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