GB1437031A - House exchange telephone system - Google Patents

House exchange telephone system

Info

Publication number
GB1437031A
GB1437031A GB1601673A GB1601673A GB1437031A GB 1437031 A GB1437031 A GB 1437031A GB 1601673 A GB1601673 A GB 1601673A GB 1601673 A GB1601673 A GB 1601673A GB 1437031 A GB1437031 A GB 1437031A
Authority
GB
United Kingdom
Prior art keywords
extension
exchange
line
interface
mark
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
GB1601673A
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.)
GE Healthcare UK Ltd
Original Assignee
GE Healthcare UK 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 GE Healthcare UK Ltd filed Critical GE Healthcare UK Ltd
Priority to GB1601673A priority Critical patent/GB1437031A/en
Priority to ZA00741829A priority patent/ZA741829B/xx
Priority to AU67342/74A priority patent/AU484482B2/en
Priority to FR7411665A priority patent/FR2224958B1/fr
Priority to DE2416122A priority patent/DE2416122A1/de
Priority to IT42622/74A priority patent/IT1010893B/it
Priority to GB2585575A priority patent/GB1542629A/en
Publication of GB1437031A publication Critical patent/GB1437031A/en
Priority to KE276977A priority patent/KE2769A/xx
Priority to KE2768A priority patent/KE2768A/xx
Priority to HK491/77A priority patent/HK49177A/xx
Priority to MY197811A priority patent/MY7800011A/xx
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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB1601673A 1973-04-04 1973-04-04 House exchange telephone system Expired GB1437031A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
GB1601673A GB1437031A (en) 1973-04-04 1973-04-04 House exchange telephone system
ZA00741829A ZA741829B (en) 1973-04-04 1974-03-20 A house exchange telephone system
AU67342/74A AU484482B2 (en) 1973-04-04 1974-03-29 A house exchange telephone system
FR7411665A FR2224958B1 (enrdf_load_stackoverflow) 1973-04-04 1974-04-02
IT42622/74A IT1010893B (it) 1973-04-04 1974-04-03 Centralino telefonico privato
DE2416122A DE2416122A1 (de) 1973-04-04 1974-04-03 Haustelefonanlage
GB2585575A GB1542629A (en) 1973-04-04 1975-06-17 House exchange telephone system
KE276977A KE2769A (en) 1973-04-04 1977-09-01 A power feed and bidirectional signalling arrangement
KE2768A KE2768A (en) 1973-04-04 1977-09-01 A house exchange telephone system
HK491/77A HK49177A (en) 1973-04-04 1977-09-22 A house exchange telephone system
MY197811A MY7800011A (en) 1973-04-04 1978-12-31 A house exchange telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1601673A GB1437031A (en) 1973-04-04 1973-04-04 House exchange telephone system

Publications (1)

Publication Number Publication Date
GB1437031A true GB1437031A (en) 1976-05-26

Family

ID=10069655

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1601673A Expired GB1437031A (en) 1973-04-04 1973-04-04 House exchange telephone system

Country Status (8)

Country Link
DE (1) DE2416122A1 (enrdf_load_stackoverflow)
FR (1) FR2224958B1 (enrdf_load_stackoverflow)
GB (1) GB1437031A (enrdf_load_stackoverflow)
HK (1) HK49177A (enrdf_load_stackoverflow)
IT (1) IT1010893B (enrdf_load_stackoverflow)
KE (1) KE2768A (enrdf_load_stackoverflow)
MY (1) MY7800011A (enrdf_load_stackoverflow)
ZA (1) ZA741829B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211895A (en) * 1976-12-10 1980-07-08 Plessey Canada Ltd. Electronic telephone system with time division multiplexed signalling
US4598172A (en) * 1983-01-19 1986-07-01 Telefonaktiebolaget Lm Ericsson Telecommunication terminal
US4621170A (en) * 1981-12-23 1986-11-04 Jeumont-Schneider Corporation Means of transmitting signals along a line while also providing a direct voltage source
US4739205A (en) * 1986-02-24 1988-04-19 Rockwell International Corporation Telephone signal multiplexing system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3112847C2 (de) * 1981-03-31 1983-02-03 Siemens AG, 1000 Berlin und 8000 München Verfahren zur wechselseitigen Übertragung von binären Datensignalen über eine beidseitig mit einem Übertrager abgeschlossene Signalleitung
US4575584A (en) * 1984-07-05 1986-03-11 Honeywell Inc. Fail-safe digital phone

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519757A (en) * 1968-02-27 1970-07-07 Bell Telephone Labor Inc Electronic key telephone system
US3549820A (en) * 1968-05-02 1970-12-22 Bell Telephone Labor Inc Key telephone station concentrator
US3604857A (en) * 1969-07-25 1971-09-14 Bell Telephone Labor Inc Line-oriented key telephone system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4211895A (en) * 1976-12-10 1980-07-08 Plessey Canada Ltd. Electronic telephone system with time division multiplexed signalling
US4621170A (en) * 1981-12-23 1986-11-04 Jeumont-Schneider Corporation Means of transmitting signals along a line while also providing a direct voltage source
US4598172A (en) * 1983-01-19 1986-07-01 Telefonaktiebolaget Lm Ericsson Telecommunication terminal
US4739205A (en) * 1986-02-24 1988-04-19 Rockwell International Corporation Telephone signal multiplexing system

Also Published As

Publication number Publication date
ZA741829B (en) 1975-03-26
HK49177A (en) 1977-09-30
DE2416122C2 (enrdf_load_stackoverflow) 1987-08-13
DE2416122A1 (de) 1974-10-24
FR2224958B1 (enrdf_load_stackoverflow) 1981-04-30
IT1010893B (it) 1977-01-20
FR2224958A1 (enrdf_load_stackoverflow) 1974-10-31
MY7800011A (en) 1978-12-31
AU6734274A (en) 1975-10-02
KE2768A (en) 1977-10-21

Similar Documents

Publication Publication Date Title
US3660611A (en) Program controlled key telephone system for automatic selection of a prime line
SE312587B (enrdf_load_stackoverflow)
GB1446609A (en) Time division multiplexed digital switching apparatus
US4611095A (en) Telephone conference bridge system
GB1437031A (en) House exchange telephone system
US5600654A (en) Multiple call offering method for use with an analog station and an ISDN station that share a directory number
GB1283968A (en) Switching systems
GB1040639A (en) Electronic switching telephone system
NO882662L (no) Fremgangsmaate ved en datamaskinstyrt svitsjeinnretning, spesielt ved en saakalt key-telefonsvitsjeinnretning med mulighet for anropsviderekobling.
US2592784A (en) Restricted service telephone system
US3691310A (en) Busy and talking link allotter circuit for electronic key telephone system
US3941936A (en) Telecommunication system using TDM switching
US3231678A (en) Subscriber controlled conference circuit
US3350508A (en) Immediate ringing circuit for telephone systems
US3997738A (en) Line circuit for telecommunications exchange using TDM
GB1471364A (en) Electronic telephone system
US3931477A (en) Telephone intercommunication systems
US3137770A (en) Telephone call holding arrangement
US3904831A (en) Tone control arrangement for electronic PABX
US3916116A (en) Hold bridge circuit
US4028499A (en) Universal/assigned night answering system for EPABX
US3215783A (en) Automatic connection line circuit
US3489857A (en) Trunk connection arrangement for private telephone exchange
US3417204A (en) Telephone trunk circuit
JPH0670034A (ja) 構内交換機

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee