GB1392747A - Data transmission telephones - Google Patents

Data transmission telephones

Info

Publication number
GB1392747A
GB1392747A GB3420172A GB3420172A GB1392747A GB 1392747 A GB1392747 A GB 1392747A GB 3420172 A GB3420172 A GB 3420172A GB 3420172 A GB3420172 A GB 3420172A GB 1392747 A GB1392747 A GB 1392747A
Authority
GB
United Kingdom
Prior art keywords
oscillator
impulsing
contacts
circuit
switch
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
GB3420172A
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB3420172A priority Critical patent/GB1392747A/en
Priority to AU57912/73A priority patent/AU5791273A/en
Priority to ZA734626A priority patent/ZA734626B/xx
Priority to NL7309979A priority patent/NL7309979A/xx
Priority to BE133672A priority patent/BE802572A/xx
Priority to FR7326722A priority patent/FR2194093B1/fr
Priority to DE2337119A priority patent/DE2337119C3/de
Publication of GB1392747A publication Critical patent/GB1392747A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/066—Telephone sets adapted for data transmision

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Telephonic Communication Services (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB3420172A 1972-07-21 1972-07-21 Data transmission telephones Expired GB1392747A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB3420172A GB1392747A (en) 1972-07-21 1972-07-21 Data transmission telephones
AU57912/73A AU5791273A (en) 1972-07-21 1973-07-10 Telephones
ZA734626A ZA734626B (en) 1972-07-21 1973-07-10 Improvements in and relating to telephones
NL7309979A NL7309979A (de) 1972-07-21 1973-07-18
BE133672A BE802572A (fr) 1972-07-21 1973-07-19 Perfectionnements relatifs aux telephones
FR7326722A FR2194093B1 (de) 1972-07-21 1973-07-20
DE2337119A DE2337119C3 (de) 1972-07-21 1973-07-20 Schaltungsanordnung für eine Fernsprechteilnehmerstation mit Wählscheibe zum Senden von Daten und Verfahren hierzu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3420172A GB1392747A (en) 1972-07-21 1972-07-21 Data transmission telephones

Publications (1)

Publication Number Publication Date
GB1392747A true GB1392747A (en) 1975-04-30

Family

ID=10362646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3420172A Expired GB1392747A (en) 1972-07-21 1972-07-21 Data transmission telephones

Country Status (7)

Country Link
AU (1) AU5791273A (de)
BE (1) BE802572A (de)
DE (1) DE2337119C3 (de)
FR (1) FR2194093B1 (de)
GB (1) GB1392747A (de)
NL (1) NL7309979A (de)
ZA (1) ZA734626B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208057A (en) * 1987-07-27 1989-02-15 Barron Mccann Limited Telephone interface device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2208057A (en) * 1987-07-27 1989-02-15 Barron Mccann Limited Telephone interface device

Also Published As

Publication number Publication date
DE2337119A1 (de) 1974-02-07
FR2194093B1 (de) 1977-02-18
DE2337119C3 (de) 1975-06-05
BE802572A (fr) 1973-11-16
AU5791273A (en) 1975-01-16
ZA734626B (en) 1974-06-26
FR2194093A1 (de) 1974-02-22
DE2337119B2 (de) 1974-10-24
NL7309979A (de) 1974-01-23

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees