JPS561647A - Connecting system under busy state of called subscriber telephone - Google Patents

Connecting system under busy state of called subscriber telephone

Info

Publication number
JPS561647A
JPS561647A JP7720279A JP7720279A JPS561647A JP S561647 A JPS561647 A JP S561647A JP 7720279 A JP7720279 A JP 7720279A JP 7720279 A JP7720279 A JP 7720279A JP S561647 A JPS561647 A JP S561647A
Authority
JP
Japan
Prior art keywords
sub
telephone
register
busy
telephone number
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
JP7720279A
Other languages
Japanese (ja)
Inventor
Hiroyuki Watabe
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 JP7720279A priority Critical patent/JPS561647A/en
Publication of JPS561647A publication Critical patent/JPS561647A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/46—Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:To secure the connection to another optional subscriber telephone in case the called subscribed is busy, by dialing the figures of the same digit number as the telephone number of the called subscriber. CONSTITUTION:The busy memory circuit of called subscriber telephone SUB-B, the timing circuit to discriminate the continuous dial pulses and the relay to convert the part or the whole of the telephone number of SUB-B into the number received newly are provided to register R of the common control type automatic exchange. Thus in case SUB-B is under the busy state, the busy tone sent from register R is transmitted to let calling subscriber SUB-A know the busy state. Then SUB-A compares the telephone number of SUB-B with the telephone number of other subscriber telephone SUB-C to be called. And then the numbers after the different number digit are dialed continuously. Register R converts the different areas of the telephone number of SUB-B which is stored in register R, and then calls out SUB-C.
JP7720279A 1979-06-19 1979-06-19 Connecting system under busy state of called subscriber telephone Pending JPS561647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7720279A JPS561647A (en) 1979-06-19 1979-06-19 Connecting system under busy state of called subscriber telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7720279A JPS561647A (en) 1979-06-19 1979-06-19 Connecting system under busy state of called subscriber telephone

Publications (1)

Publication Number Publication Date
JPS561647A true JPS561647A (en) 1981-01-09

Family

ID=13627233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7720279A Pending JPS561647A (en) 1979-06-19 1979-06-19 Connecting system under busy state of called subscriber telephone

Country Status (1)

Country Link
JP (1) JPS561647A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5929604A (en) * 1982-08-13 1984-02-16 Nissan Chem Ind Ltd Herbicidal suspension composition

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5929604A (en) * 1982-08-13 1984-02-16 Nissan Chem Ind Ltd Herbicidal suspension composition
JPH0417923B2 (en) * 1982-08-13 1992-03-26 Nissan Chemical Ind Ltd

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