JPS5778246A - Incoming call reception service system - Google Patents

Incoming call reception service system

Info

Publication number
JPS5778246A
JPS5778246A JP15319280A JP15319280A JPS5778246A JP S5778246 A JPS5778246 A JP S5778246A JP 15319280 A JP15319280 A JP 15319280A JP 15319280 A JP15319280 A JP 15319280A JP S5778246 A JPS5778246 A JP S5778246A
Authority
JP
Japan
Prior art keywords
incoming call
hooking
telephone
telephone sets
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
JP15319280A
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 JP15319280A priority Critical patent/JPS5778246A/en
Publication of JPS5778246A publication Critical patent/JPS5778246A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To enable the response by hooking of other telephone sets, by providing a switching device, when a specific number of telephone sets to the same subscriber, in a telephone exchange network. CONSTITUTION:A hooking detecting circuit HDET detects the presence or absence of a current passing through a line with a low impedance. Further, an incoming call signal detecting circuit RDET detects a call signal voltage across the line and the circuit is constituted as a high impedance. When a TA relay a switcher TRU is operated and a TB relay of another device TRU is in operation, channel switching is made between the two devices TRUs. Thus, if an incoming call is produced to a telephone exchanger, response can be made with hooking from other telephone sets.
JP15319280A 1980-10-31 1980-10-31 Incoming call reception service system Pending JPS5778246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15319280A JPS5778246A (en) 1980-10-31 1980-10-31 Incoming call reception service system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15319280A JPS5778246A (en) 1980-10-31 1980-10-31 Incoming call reception service system

Publications (1)

Publication Number Publication Date
JPS5778246A true JPS5778246A (en) 1982-05-15

Family

ID=15557052

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15319280A Pending JPS5778246A (en) 1980-10-31 1980-10-31 Incoming call reception service system

Country Status (1)

Country Link
JP (1) JPS5778246A (en)

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