AU597420B2 - Electronic holding for two-loop telephones supplied via the subscriber line - Google Patents

Electronic holding for two-loop telephones supplied via the subscriber line Download PDF

Info

Publication number
AU597420B2
AU597420B2 AU78245/87A AU7824587A AU597420B2 AU 597420 B2 AU597420 B2 AU 597420B2 AU 78245/87 A AU78245/87 A AU 78245/87A AU 7824587 A AU7824587 A AU 7824587A AU 597420 B2 AU597420 B2 AU 597420B2
Authority
AU
Australia
Prior art keywords
subscriber line
transistor
microprocessor
thyristor
control unit
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.)
Ceased
Application number
AU78245/87A
Other languages
English (en)
Other versions
AU7824587A (en
Inventor
Wolfgang Strzeletz
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of AU7824587A publication Critical patent/AU7824587A/en
Application granted granted Critical
Publication of AU597420B2 publication Critical patent/AU597420B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • 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
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
AU78245/87A 1986-09-11 1987-09-10 Electronic holding for two-loop telephones supplied via the subscriber line Ceased AU597420B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630989 1986-09-11
DE3630989 1986-09-11

Publications (2)

Publication Number Publication Date
AU7824587A AU7824587A (en) 1988-03-17
AU597420B2 true AU597420B2 (en) 1990-05-31

Family

ID=6309389

Family Applications (1)

Application Number Title Priority Date Filing Date
AU78245/87A Ceased AU597420B2 (en) 1986-09-11 1987-09-10 Electronic holding for two-loop telephones supplied via the subscriber line

Country Status (4)

Country Link
EP (1) EP0263972A3 (US20090163788A1-20090625-C00002.png)
AU (1) AU597420B2 (US20090163788A1-20090625-C00002.png)
FI (1) FI873929A (US20090163788A1-20090625-C00002.png)
IN (1) IN164858B (US20090163788A1-20090625-C00002.png)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN167984B (US20090163788A1-20090625-C00002.png) * 1986-09-23 1991-01-19 Siemens Ag

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7883587A (en) * 1986-09-23 1988-03-31 Siemens Aktiengesellschaft Apparatus for simulating the dialling pulse switch in a two-loop telephone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766325A (en) * 1971-09-13 1973-10-16 Lordel Mfg Co Control circuits for key telephone system
US4490583A (en) * 1983-02-14 1984-12-25 Circom, Inc. Plural line telephone controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7883587A (en) * 1986-09-23 1988-03-31 Siemens Aktiengesellschaft Apparatus for simulating the dialling pulse switch in a two-loop telephone

Also Published As

Publication number Publication date
EP0263972A3 (de) 1989-06-07
IN164858B (US20090163788A1-20090625-C00002.png) 1989-06-17
EP0263972A2 (de) 1988-04-20
AU7824587A (en) 1988-03-17
FI873929A0 (fi) 1987-09-10
FI873929A (fi) 1988-03-12

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