NL7309979A - - Google Patents
Info
- Publication number
- NL7309979A NL7309979A NL7309979A NL7309979A NL7309979A NL 7309979 A NL7309979 A NL 7309979A NL 7309979 A NL7309979 A NL 7309979A NL 7309979 A NL7309979 A NL 7309979A NL 7309979 A NL7309979 A NL 7309979A
- Authority
- NL
- Netherlands
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)
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 |
|---|---|
| NL7309979A true NL7309979A (de) | 1974-01-23 |
Family
ID=10362646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7309979A NL7309979A (de) | 1972-07-21 | 1973-07-18 |
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) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2208057A (en) * | 1987-07-27 | 1989-02-15 | Barron Mccann Limited | Telephone interface device |
-
1972
- 1972-07-21 GB GB3420172A patent/GB1392747A/en not_active Expired
-
1973
- 1973-07-10 AU AU57912/73A patent/AU5791273A/en not_active Expired
- 1973-07-10 ZA ZA734626A patent/ZA734626B/xx unknown
- 1973-07-18 NL NL7309979A patent/NL7309979A/xx unknown
- 1973-07-19 BE BE133672A patent/BE802572A/xx unknown
- 1973-07-20 DE DE2337119A patent/DE2337119C3/de not_active Expired
- 1973-07-20 FR FR7326722A patent/FR2194093B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2337119A1 (de) | 1974-02-07 |
| FR2194093B1 (de) | 1977-02-18 |
| GB1392747A (en) | 1975-04-30 |
| 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 |