GB2029165B - Switching equipment for a keycontrolled intercom or public address system - Google Patents

Switching equipment for a keycontrolled intercom or public address system

Info

Publication number
GB2029165B
GB2029165B GB7928665A GB7928665A GB2029165B GB 2029165 B GB2029165 B GB 2029165B GB 7928665 A GB7928665 A GB 7928665A GB 7928665 A GB7928665 A GB 7928665A GB 2029165 B GB2029165 B GB 2029165B
Authority
GB
United Kingdom
Prior art keywords
keycontrolled
intercom
switching equipment
public address
address system
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
GB7928665A
Other versions
GB2029165A (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.)
NEUMANN ELEKTRONIK GmbH
Original Assignee
NEUMANN ELEKTRONIK GmbH
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 NEUMANN ELEKTRONIK GmbH filed Critical NEUMANN ELEKTRONIK GmbH
Publication of GB2029165A publication Critical patent/GB2029165A/en
Application granted granted Critical
Publication of GB2029165B publication Critical patent/GB2029165B/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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Telephonic Communication Services (AREA)
GB7928665A 1978-08-31 1979-08-16 Switching equipment for a keycontrolled intercom or public address system Expired GB2029165B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782837950 DE2837950C2 (en) 1978-08-31 1978-08-31 Switching device for a button-controlled exchange, counter or loudspeaker system

Publications (2)

Publication Number Publication Date
GB2029165A GB2029165A (en) 1980-03-12
GB2029165B true GB2029165B (en) 1982-08-25

Family

ID=6048319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7928665A Expired GB2029165B (en) 1978-08-31 1979-08-16 Switching equipment for a keycontrolled intercom or public address system

Country Status (6)

Country Link
AT (1) AT372560B (en)
BE (1) BE878527A (en)
CH (1) CH645493A5 (en)
DE (1) DE2837950C2 (en)
GB (1) GB2029165B (en)
NL (1) NL183264C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000858C2 (en) * 1980-01-11 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Button-controlled exchange, counter or loudspeaker system
DE3214657C2 (en) * 1982-04-21 1985-07-04 ANT Nachrichtentechnik GmbH, 7150 Backnang Device for voice and / or data switching and transmission
DE4107593C1 (en) * 1991-03-09 1992-05-21 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
DE4107591C1 (en) * 1991-03-09 1992-03-05 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung Ev, 8000 Muenchen, De
DE4236046C1 (en) * 1992-10-24 1993-11-25 Loh Kg Ritto Werk Intercom system with centralised control - uses duplex amplifiers in connection path between calling and called speech stations with respective amplifier paths for each direction
DE4334906C2 (en) * 1993-10-13 1997-05-07 Neumann Elektronik Gmbh Device for the transmission of call and occupancy status signals from two-way or intercom systems with line selection via a two-wire transmission line

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1437967B2 (en) * 1965-04-28 1970-05-21 Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm Circuit arrangement for a button-controlled intercom system
DE2434321C3 (en) * 1974-07-17 1983-12-08 Neumann Elektronik GmbH, 4330 Mülheim Circuit arrangement for button-controlled intercom, intercom or loudspeaker systems
DE2741000C2 (en) * 1977-09-12 1982-04-15 Industronic, Industrie-Electronic Gmbh & Co Kg, 6980 Wertheim Line-bound transmission system for speech communication and information processing

Also Published As

Publication number Publication date
NL7905213A (en) 1980-03-04
DE2837950C2 (en) 1986-11-13
NL183264B (en) 1988-04-05
CH645493A5 (en) 1984-09-28
BE878527A (en) 1979-12-17
DE2837950B1 (en) 1980-02-28
AT372560B (en) 1983-10-25
ATA464879A (en) 1983-02-15
NL183264C (en) 1988-09-01
GB2029165A (en) 1980-03-12

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960816