AU5791273A - Telephones - Google Patents

Telephones

Info

Publication number
AU5791273A
AU5791273A AU57912/73A AU5791273A AU5791273A AU 5791273 A AU5791273 A AU 5791273A AU 57912/73 A AU57912/73 A AU 57912/73A AU 5791273 A AU5791273 A AU 5791273A AU 5791273 A AU5791273 A AU 5791273A
Authority
AU
Australia
Prior art keywords
telephones
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
AU57912/73A
Inventor
John Michael Griffiths
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of AU5791273A publication Critical patent/AU5791273A/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
AU57912/73A 1972-07-21 1973-07-10 Telephones Expired AU5791273A (en)

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
AU5791273A true AU5791273A (en) 1975-01-16

Family

ID=10362646

Family Applications (1)

Application Number Title Priority Date Filing Date
AU57912/73A Expired AU5791273A (en) 1972-07-21 1973-07-10 Telephones

Country Status (7)

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

Families Citing this family (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
GB1392747A (en) 1975-04-30
FR2194093A1 (en) 1974-02-22
DE2337119A1 (en) 1974-02-07
NL7309979A (en) 1974-01-23
DE2337119C3 (en) 1975-06-05
FR2194093B1 (en) 1977-02-18
DE2337119B2 (en) 1974-10-24
ZA734626B (en) 1974-06-26
BE802572A (en) 1973-11-16

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