AU470553B2 - Improvements in or relating to electric impulse transmitters - Google Patents
Improvements in or relating to electric impulse transmittersInfo
- Publication number
- AU470553B2 AU470553B2 AU49596/72A AU4959672A AU470553B2 AU 470553 B2 AU470553 B2 AU 470553B2 AU 49596/72 A AU49596/72 A AU 49596/72A AU 4959672 A AU4959672 A AU 4959672A AU 470553 B2 AU470553 B2 AU 470553B2
- Authority
- AU
- Australia
- Prior art keywords
- relating
- electric impulse
- impulse transmitters
- transmitters
- electric
- 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
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
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Telephonic Communication Services (AREA)
- Exchange Systems With Centralized Control (AREA)
- Mobile Radio Communication Systems (AREA)
- Electronic Switches (AREA)
- Selective Calling Equipment (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB59927/71 | 1971-12-23 | ||
GB5992771A GB1369829A (en) | 1971-12-23 | 1971-12-23 | Electric impulse transmitters |
Publications (2)
Publication Number | Publication Date |
---|---|
AU4959672A AU4959672A (en) | 1974-06-06 |
AU470553B2 true AU470553B2 (en) | 1976-03-18 |
Family
ID=10484670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU49596/72A Expired AU470553B2 (en) | 1971-12-23 | 1972-12-04 | Improvements in or relating to electric impulse transmitters |
Country Status (8)
Country | Link |
---|---|
AU (1) | AU470553B2 (en) |
DE (1) | DE2262505C2 (en) |
ES (1) | ES409985A1 (en) |
FR (1) | FR2165649A5 (en) |
GB (1) | GB1369829A (en) |
IE (1) | IE37079B1 (en) |
IT (1) | IT972579B (en) |
ZA (1) | ZA728043B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7907134A (en) * | 1979-09-25 | 1981-03-27 | Ericsson Telefon Mij | TELEPHONE INSTALLATION OF THE TYPE INDICATED AS A STAR POINT INSTALLATION. |
FR2501938B1 (en) * | 1981-03-13 | 1985-06-21 | Constr Telephoniques | SIGNAL CONFORMER CIRCUIT |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1236961A (en) * | 1968-01-12 | 1971-06-23 | Gen Electric Co Ltd | Improvements in or relating to electric impulse transmitters |
-
1971
- 1971-12-23 GB GB5992771A patent/GB1369829A/en not_active Expired
- 1971-12-23 ZA ZA728043A patent/ZA728043B/en unknown
-
1972
- 1972-11-15 IE IE1572/72A patent/IE37079B1/en unknown
- 1972-12-04 AU AU49596/72A patent/AU470553B2/en not_active Expired
- 1972-12-20 IT IT33187/72A patent/IT972579B/en active
- 1972-12-20 DE DE2262505A patent/DE2262505C2/en not_active Expired
- 1972-12-21 FR FR7245702A patent/FR2165649A5/fr not_active Expired
- 1972-12-22 ES ES409985A patent/ES409985A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IE37079L (en) | 1973-06-23 |
IT972579B (en) | 1974-05-31 |
FR2165649A5 (en) | 1973-08-03 |
AU4959672A (en) | 1974-06-06 |
DE2262505C2 (en) | 1982-12-09 |
DE2262505A1 (en) | 1973-06-28 |
ZA728043B (en) | 1973-07-25 |
GB1369829A (en) | 1974-10-09 |
ES409985A1 (en) | 1976-04-01 |
IE37079B1 (en) | 1977-04-27 |
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