JPS573465A - Retrieval system for telephone line network crossing state - Google Patents

Retrieval system for telephone line network crossing state

Info

Publication number
JPS573465A
JPS573465A JP7645080A JP7645080A JPS573465A JP S573465 A JPS573465 A JP S573465A JP 7645080 A JP7645080 A JP 7645080A JP 7645080 A JP7645080 A JP 7645080A JP S573465 A JPS573465 A JP S573465A
Authority
JP
Japan
Prior art keywords
station
information
signal
telephone line
retrieval system
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
JP7645080A
Other languages
Japanese (ja)
Inventor
Masayasu Chiba
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 JP7645080A priority Critical patent/JPS573465A/en
Publication of JPS573465A publication Critical patent/JPS573465A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
    • H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To detect nonconnected stations, by providing a means to monitor up to train closing with an outgoing station and providing a means to add a station information signal to busy tone signal with each exchange station. CONSTITUTION:An outgoing station is provided with a test device TSTE and it is provided with an automatic dial function. Further, an incoming station is provided with an automatic response trunk ATT. On the other hand, each station is provided with a function to add a TN signal by about 30ms every one information at the end of intermittent pulse BT in 400Hz. Further, each information TN consists of the information of ''A'' ''E'' which can identify stations, and if nonconnection is made at the station B, the test device TSTE can identify the nonconnection of the station B, by transmitting the station signal of the station B as the tone as TN1 together with a busy tone BT.
JP7645080A 1980-06-06 1980-06-06 Retrieval system for telephone line network crossing state Pending JPS573465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7645080A JPS573465A (en) 1980-06-06 1980-06-06 Retrieval system for telephone line network crossing state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7645080A JPS573465A (en) 1980-06-06 1980-06-06 Retrieval system for telephone line network crossing state

Publications (1)

Publication Number Publication Date
JPS573465A true JPS573465A (en) 1982-01-08

Family

ID=13605483

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7645080A Pending JPS573465A (en) 1980-06-06 1980-06-06 Retrieval system for telephone line network crossing state

Country Status (1)

Country Link
JP (1) JPS573465A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148091A (en) * 1985-12-23 1987-07-02 Toshiba Corp Control device for resistance welding machine
JPH04505043A (en) * 1989-05-03 1992-09-03 ジヨンソン・サービス・カンパニー Electronic controls for monitoring compressor status

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62148091A (en) * 1985-12-23 1987-07-02 Toshiba Corp Control device for resistance welding machine
JPH0367474B2 (en) * 1985-12-23 1991-10-23 Tokyo Shibaura Electric Co
JPH04505043A (en) * 1989-05-03 1992-09-03 ジヨンソン・サービス・カンパニー Electronic controls for monitoring compressor status

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