JPS57180261A - Digital tone receiver - Google Patents

Digital tone receiver

Info

Publication number
JPS57180261A
JPS57180261A JP6442381A JP6442381A JPS57180261A JP S57180261 A JPS57180261 A JP S57180261A JP 6442381 A JP6442381 A JP 6442381A JP 6442381 A JP6442381 A JP 6442381A JP S57180261 A JPS57180261 A JP S57180261A
Authority
JP
Japan
Prior art keywords
test
frequency signal
use multi
test use
channel
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
JP6442381A
Other languages
Japanese (ja)
Inventor
Hitoshi Shirai
Shuichi Ashihara
Tamahiko Ishiguro
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP6442381A priority Critical patent/JPS57180261A/en
Publication of JPS57180261A publication Critical patent/JPS57180261A/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
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation

Landscapes

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

Abstract

PURPOSE:To enable a test without forming a channel every time at the execution of test, by incorporating a test use multi-frequency signal generating circuit in a receiver and transmitting the test use multi-frequency signal for test. CONSTITUTION:When a channel assigned to a digital tone receiver 3 is vacant, a test use multi-frequency signal is inputted to the vacant channel from a test use multi-frequency signal generating circuit 10, the inputted test use multi- frequency signal is detected and it is collated with a preset comparison data for failure detection. Thus, at no calling, since the test is always performed, the test execution period is short and a failure can immediately be detected, if the failure takes place.
JP6442381A 1981-04-28 1981-04-28 Digital tone receiver Pending JPS57180261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6442381A JPS57180261A (en) 1981-04-28 1981-04-28 Digital tone receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6442381A JPS57180261A (en) 1981-04-28 1981-04-28 Digital tone receiver

Publications (1)

Publication Number Publication Date
JPS57180261A true JPS57180261A (en) 1982-11-06

Family

ID=13257846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6442381A Pending JPS57180261A (en) 1981-04-28 1981-04-28 Digital tone receiver

Country Status (1)

Country Link
JP (1) JPS57180261A (en)

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