JPS5397716A - Automatic return system for pcm relay transmission line - Google Patents

Automatic return system for pcm relay transmission line

Info

Publication number
JPS5397716A
JPS5397716A JP1275477A JP1275477A JPS5397716A JP S5397716 A JPS5397716 A JP S5397716A JP 1275477 A JP1275477 A JP 1275477A JP 1275477 A JP1275477 A JP 1275477A JP S5397716 A JPS5397716 A JP S5397716A
Authority
JP
Japan
Prior art keywords
transmission line
relay transmission
return system
automatic return
pcm relay
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
JP1275477A
Other languages
Japanese (ja)
Inventor
Kunitetsu Makino
Shujiro Hoshiko
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
Nippon Electric Co Ltd
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, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1275477A priority Critical patent/JPS5397716A/en
Publication of JPS5397716A publication Critical patent/JPS5397716A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/404—Monitoring; Testing of relay systems with selective localization using different frequencies selected by local filters

Abstract

PURPOSE:To ensure an accurate constitution of the return circuit in a short time at the opposite station, by carrying out the test for the repeater action through an operation only from one terminal station.
JP1275477A 1977-02-07 1977-02-07 Automatic return system for pcm relay transmission line Pending JPS5397716A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1275477A JPS5397716A (en) 1977-02-07 1977-02-07 Automatic return system for pcm relay transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1275477A JPS5397716A (en) 1977-02-07 1977-02-07 Automatic return system for pcm relay transmission line

Publications (1)

Publication Number Publication Date
JPS5397716A true JPS5397716A (en) 1978-08-26

Family

ID=11814186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1275477A Pending JPS5397716A (en) 1977-02-07 1977-02-07 Automatic return system for pcm relay transmission line

Country Status (1)

Country Link
JP (1) JPS5397716A (en)

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