JPS5779791A - Restriction system for toll calling - Google Patents

Restriction system for toll calling

Info

Publication number
JPS5779791A
JPS5779791A JP15484080A JP15484080A JPS5779791A JP S5779791 A JPS5779791 A JP S5779791A JP 15484080 A JP15484080 A JP 15484080A JP 15484080 A JP15484080 A JP 15484080A JP S5779791 A JPS5779791 A JP S5779791A
Authority
JP
Japan
Prior art keywords
cot
call
sta
dtdtc
call tone
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
JP15484080A
Other languages
Japanese (ja)
Inventor
Yoshikazu Yamauchi
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 JP15484080A priority Critical patent/JPS5779791A/en
Publication of JPS5779791A publication Critical patent/JPS5779791A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

PURPOSE:To prevent ineffective restrictin of toll call due to failed dialing of extensions, by providing a means which enables the transmission of selection signal from a trunk line trunk through the detection of call tone of a station concerned. CONSTITUTION:When an extension STA makes trunk line call, a controller CC prepares a path connecting the STA and a trunk line trunk COT, connects the COT and a call tone detector DTDTC and starts a belonging station CO. The started CO makes call connection and transmits a call tone. The call tone transmitted from the CO is detected with the DTDTC, then the signal is given to a CC, which restores the path connecting the COT and the DTDTC to connect the STA and the COT. After the STA confirms the call tone transmitted from the CO via COT and an NW, the telephone number of opposing party is dialed.
JP15484080A 1980-11-04 1980-11-04 Restriction system for toll calling Pending JPS5779791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15484080A JPS5779791A (en) 1980-11-04 1980-11-04 Restriction system for toll calling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15484080A JPS5779791A (en) 1980-11-04 1980-11-04 Restriction system for toll calling

Publications (1)

Publication Number Publication Date
JPS5779791A true JPS5779791A (en) 1982-05-19

Family

ID=15593029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15484080A Pending JPS5779791A (en) 1980-11-04 1980-11-04 Restriction system for toll calling

Country Status (1)

Country Link
JP (1) JPS5779791A (en)

Similar Documents

Publication Publication Date Title
JPS5672567A (en) Automatic message communication system
GB1352212A (en) Remote control telephone apparatus
JPS56109051A (en) Prevention system of incorrect usage of mobile set
JPS5779791A (en) Restriction system for toll calling
JPS54122917A (en) Confirming system of other party in analog facsimile communication
JPS58187050A (en) Automatic dial device
JPS56103564A (en) Paging transfer system
JPS56152393A (en) Multiparty radiotelephony system
JPS5690670A (en) Communication system
JPS56149860A (en) Incoming transfer system
JPS5563162A (en) Subscriber line call signal transmission system
JPS5739660A (en) Outgoing subscriber circuit
JPS5745767A (en) Voice response service system
JPS54152906A (en) Specific-number telephone system
JPS5755656A (en) Tracking system mischievous call
JPS5690667A (en) Automatic transfer system for incoming call
JPS5672568A (en) Automatic incoming charging communication system
JPS6468170A (en) Automatic signal change circuit
JPS5775093A (en) Sender connection system
JPS56111367A (en) Absence transfer system
JPS54148303A (en) Number confirming system for originating telephone terminal
JPS5549060A (en) Calling subscriber discriminator
JPS5637752A (en) Originating connection system for facsimile storage service system
JPS5776990A (en) Restriction system for earlier dialing of trunk line call
JPS5691573A (en) Reception system for dial information