GB1317984A - Key telephone systems - Google Patents

Key telephone systems

Info

Publication number
GB1317984A
GB1317984A GB3588770A GB3588770A GB1317984A GB 1317984 A GB1317984 A GB 1317984A GB 3588770 A GB3588770 A GB 3588770A GB 3588770 A GB3588770 A GB 3588770A GB 1317984 A GB1317984 A GB 1317984A
Authority
GB
United Kingdom
Prior art keywords
line
station
module
data
modules
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.)
Expired
Application number
GB3588770A
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1317984A publication Critical patent/GB1317984A/en
Expired 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
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/007—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line wherein the key telephone sets are star-connected to a central unit by a limited number of lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
GB3588770A 1969-07-25 1970-07-24 Key telephone systems Expired GB1317984A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84491369A 1969-07-25 1969-07-25

Publications (1)

Publication Number Publication Date
GB1317984A true GB1317984A (en) 1973-05-23

Family

ID=25293952

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3588770A Expired GB1317984A (en) 1969-07-25 1970-07-24 Key telephone systems

Country Status (7)

Country Link
US (1) US3604857A (enExample)
BE (1) BE753695A (enExample)
DE (1) DE2036815C3 (enExample)
FR (1) FR2055523A5 (enExample)
GB (1) GB1317984A (enExample)
NL (1) NL170215C (enExample)
SE (1) SE370603B (enExample)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3701854A (en) * 1970-12-21 1972-10-31 Bell Telephone Labor Inc Key telephone system call signaling and station set data transfer arrangement
CA923644A (en) * 1971-06-16 1973-03-27 Ebrahimi Jalal Line circuit for key telephone system
CA1018270A (en) * 1972-05-23 1977-09-27 Federico R. Laliccia Key telephone system using time division and space division control
GB1400237A (en) * 1972-11-10 1975-07-16 Gte International Inc Automatic telephone exchange system
GB1437031A (en) * 1973-04-04 1976-05-26 Plessey Co Ltd House exchange telephone system
US3920902A (en) * 1973-04-05 1975-11-18 Nitsuko Ltd Off-premises station line circuit for a key telephone system
US4027110A (en) * 1973-12-05 1977-05-31 Iwasaki Tsushinki Kabushiki Kaisha Key telephone system
US3920928A (en) * 1974-03-29 1975-11-18 Bell Telephone Labor Inc Line control circuit
USRE29078E (en) * 1974-03-29 1976-12-14 Bell Telephone Laboratories, Incorporated Key telephone system
US3920929A (en) * 1974-03-29 1975-11-18 Bell Telephone Labor Inc Key telephone system
US3973085A (en) * 1974-09-26 1976-08-03 The Anaconda Company Key telephone system with directly associated station cards and sets
US4028498A (en) * 1974-10-07 1977-06-07 Solid State Systems, Inc. Private automatic branch exchange system and apparatus
US4061887A (en) * 1976-04-23 1977-12-06 Rolm Corporation Key telephone adapter for electronic telephone switching system
US4184054A (en) * 1977-03-28 1980-01-15 Tokyo Shibaura Electric Co., Ltd. Key telephone system
US4286118A (en) * 1979-07-02 1981-08-25 Solid State Systems, Inc. Data distribution system for private automatic branch exchange
JPS6022868B2 (ja) * 1979-07-03 1985-06-04 株式会社田村電機製作所 ボタン電話交換システム
US4381427A (en) * 1981-06-16 1983-04-26 Northern Telecom Limited Subscriber loop system for voice and data
US7844020B2 (en) * 2007-06-08 2010-11-30 Advantest Corporation Transmission system, transmitter, receiver, and transmission method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385935A (en) * 1964-10-19 1968-05-28 Bell Telephone Labor Inc Key telephone system
US3420961A (en) * 1965-06-01 1969-01-07 Bell Telephone Labor Inc Time division key telephone system

Also Published As

Publication number Publication date
DE2036815C3 (de) 1979-11-15
BE753695A (fr) 1970-12-31
FR2055523A5 (enExample) 1971-05-07
US3604857A (en) 1971-09-14
DE2036815A1 (de) 1971-02-04
NL170215C (nl) 1982-10-01
NL170215B (nl) 1982-05-03
SE370603B (enExample) 1974-10-21
DE2036815B2 (de) 1979-04-05
NL7010988A (enExample) 1971-01-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee