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GB1555002A - Voice frequency receiver - Google Patents

Voice frequency receiver

Info

Publication number
GB1555002A
GB1555002A GB1844278A GB1844278A GB1555002A GB 1555002 A GB1555002 A GB 1555002A GB 1844278 A GB1844278 A GB 1844278A GB 1844278 A GB1844278 A GB 1844278A GB 1555002 A GB1555002 A GB 1555002A
Authority
GB
United Kingdom
Prior art keywords
frequency receiver
voice frequency
voice
receiver
frequency
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
GB1844278A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1555002A publication Critical patent/GB1555002A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB1844278A 1977-05-26 1978-05-09 Voice frequency receiver Expired GB1555002A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772723795 DE2723795A1 (en) 1977-05-26 1977-05-26 CIRCUIT ARRANGEMENT FOR THE SEPARATION OF A FAULT OR SIGNAL SOURCE FROM A TELEPHONE LINE OPERATED KEY-TELEPHONE

Publications (1)

Publication Number Publication Date
GB1555002A true GB1555002A (en) 1979-11-07

Family

ID=6009942

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1844278A Expired GB1555002A (en) 1977-05-26 1978-05-09 Voice frequency receiver

Country Status (5)

Country Link
BE (1) BE867511A (en)
BR (1) BR7803325A (en)
DE (1) DE2723795A1 (en)
FR (1) FR2392567A1 (en)
GB (1) GB1555002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065598A1 (en) * 1981-05-15 1982-12-01 International Business Machines Corporation Improvements in telecommunication receivers

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH678782A5 (en) * 1989-05-31 1991-10-31 Siemens Ag Albis

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1339209A (en) * 1963-04-06 1963-10-04 Int Standard Electric Corp Voice frequency receiver
CH465677A (en) * 1963-04-06 1968-11-30 Standard Telephon & Radio Ag Circuit arrangement for the dialing devices of a telephone exchange
NL7113750A (en) * 1971-10-07 1973-04-10

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0065598A1 (en) * 1981-05-15 1982-12-01 International Business Machines Corporation Improvements in telecommunication receivers

Also Published As

Publication number Publication date
FR2392567A1 (en) 1978-12-22
BE867511A (en) 1978-11-27
DE2723795A1 (en) 1978-12-07
BR7803325A (en) 1979-02-20

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Legal Events

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