GB1501704A - Telephone installations and telephone sets - Google Patents

Telephone installations and telephone sets

Info

Publication number
GB1501704A
GB1501704A GB14709/75A GB1470975A GB1501704A GB 1501704 A GB1501704 A GB 1501704A GB 14709/75 A GB14709/75 A GB 14709/75A GB 1470975 A GB1470975 A GB 1470975A GB 1501704 A GB1501704 A GB 1501704A
Authority
GB
United Kingdom
Prior art keywords
line
station
external
button
call
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
GB14709/75A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1501704A publication Critical patent/GB1501704A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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)
  • Telephonic Communication Services (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephone Function (AREA)
  • Structure Of Telephone Exchanges (AREA)
GB14709/75A 1974-04-11 1975-04-09 Telephone installations and telephone sets Expired GB1501704A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7404995A NL7404995A (nl) 1974-04-11 1974-04-11 Voor particulier gebruik dienende telefoon- installatie.

Publications (1)

Publication Number Publication Date
GB1501704A true GB1501704A (en) 1978-02-22

Family

ID=19821159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14709/75A Expired GB1501704A (en) 1974-04-11 1975-04-09 Telephone installations and telephone sets

Country Status (8)

Country Link
DK (1) DK154475A (nl)
FI (1) FI60475C (nl)
FR (1) FR2267670B1 (nl)
GB (1) GB1501704A (nl)
IT (1) IT1037245B (nl)
NL (1) NL7404995A (nl)
NO (1) NO141875B (nl)
SE (1) SE409537B (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179523A (en) * 1985-08-23 1987-03-04 Ferranti Gte Limited Private telephone system
GB2183968A (en) * 1985-11-27 1987-06-10 Rauland Corp Intercommunication system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1535650A (en) * 1976-11-18 1978-12-13 Int Standard Electric Corp Electronic switching device for producing a timed signal

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2179523A (en) * 1985-08-23 1987-03-04 Ferranti Gte Limited Private telephone system
GB2179523B (en) * 1985-08-23 1989-07-19 Ferranti Gte Limited Private telephone system
GB2183968A (en) * 1985-11-27 1987-06-10 Rauland Corp Intercommunication system
US4744103A (en) * 1985-11-27 1988-05-10 Rauland-Borg Corporation Computer controlled multi-link communication system
GB2183968B (en) * 1985-11-27 1989-11-08 Rauland Corp Computer controlled multi-link communication system

Also Published As

Publication number Publication date
NO751275L (nl) 1975-10-14
NO141875B (no) 1980-02-11
FI60475C (fi) 1982-01-11
NL7404995A (nl) 1975-10-14
DK154475A (nl) 1975-10-12
SE409537B (sv) 1979-08-20
FR2267670B1 (nl) 1982-10-08
FI751008A (nl) 1975-10-12
FI60475B (fi) 1981-09-30
IT1037245B (it) 1979-11-10
FR2267670A1 (nl) 1975-11-07
SE7503102L (sv) 1975-10-13

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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