JPS5715557A - Test method for telephone terminal - Google Patents

Test method for telephone terminal

Info

Publication number
JPS5715557A
JPS5715557A JP8920180A JP8920180A JPS5715557A JP S5715557 A JPS5715557 A JP S5715557A JP 8920180 A JP8920180 A JP 8920180A JP 8920180 A JP8920180 A JP 8920180A JP S5715557 A JPS5715557 A JP S5715557A
Authority
JP
Japan
Prior art keywords
circuit
signal
pattern
digital
subscriber
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
JP8920180A
Other languages
Japanese (ja)
Inventor
Tetsuo Takemura
Takao Kato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8920180A priority Critical patent/JPS5715557A/en
Publication of JPS5715557A publication Critical patent/JPS5715557A/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
    • H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
    • H04M3/302—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs
    • H04M3/303—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop using modulation techniques for copper pairs and using PCM multiplexers, e.g. pair gain systems

Landscapes

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

Abstract

PURPOSE:To measure the bit error rate, by transmitting a random pattern signal from a station and comparing it with a signal returned from a digital telephone set. CONSTITUTION:A digital signal produced at a random pattern generating circuit 17 is applied to a callout signal pattern eliminaing circuit 18, and after the same digital signal as the callout signal pattern is changed into other patterns, it is transmitted to a subscriber circuit via the link. A signal transmitted from the subscriber circuit to the subscriber line is folded at a digital telephone set and inputted to one of a pattern comparison circuit via the subscriber circuit and the link. The output of the circuit 18 is connected to another input of the circuit 19, where both digital signals are compared to calculate the bit error rate.
JP8920180A 1980-07-02 1980-07-02 Test method for telephone terminal Pending JPS5715557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8920180A JPS5715557A (en) 1980-07-02 1980-07-02 Test method for telephone terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8920180A JPS5715557A (en) 1980-07-02 1980-07-02 Test method for telephone terminal

Publications (1)

Publication Number Publication Date
JPS5715557A true JPS5715557A (en) 1982-01-26

Family

ID=13964093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8920180A Pending JPS5715557A (en) 1980-07-02 1980-07-02 Test method for telephone terminal

Country Status (1)

Country Link
JP (1) JPS5715557A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264852A (en) * 1985-05-20 1986-11-22 Fujitsu Ltd Digital subscriber line test system
JPS62222755A (en) * 1986-03-10 1987-09-30 Fujitsu Ltd Digital subscriber line supervisory system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264852A (en) * 1985-05-20 1986-11-22 Fujitsu Ltd Digital subscriber line test system
JPH0414910B2 (en) * 1985-05-20 1992-03-16 Fujitsu Ltd
JPS62222755A (en) * 1986-03-10 1987-09-30 Fujitsu Ltd Digital subscriber line supervisory system
JPH0419737B2 (en) * 1986-03-10 1992-03-31 Fujitsu Ltd

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