CA1216689A - Systeme de lignes telephoniques supplementaires utilisant les lignes de secteur, avec transmission de signaux codes entre les postes telephoniques, tele- conferences en duplex, garde d'appels, lignes supplementaires multi-telephones et interphone - Google Patents
Systeme de lignes telephoniques supplementaires utilisant les lignes de secteur, avec transmission de signaux codes entre les postes telephoniques, tele- conferences en duplex, garde d'appels, lignes supplementaires multi-telephones et interphoneInfo
- Publication number
- CA1216689A CA1216689A CA000437936A CA437936A CA1216689A CA 1216689 A CA1216689 A CA 1216689A CA 000437936 A CA000437936 A CA 000437936A CA 437936 A CA437936 A CA 437936A CA 1216689 A CA1216689 A CA 1216689A
- Authority
- CA
- Canada
- Prior art keywords
- telephone
- station
- line
- signal
- signals
- 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
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/544—Setting up communications; Call and signalling arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5437—Wired telephone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US43085182A | 1982-09-30 | 1982-09-30 | |
US06/430,762 US4514594A (en) | 1982-09-30 | 1982-09-30 | Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability |
US06/432,400 US4562884A (en) | 1981-11-25 | 1982-09-30 | Heat-exchanger arrangement |
US430,762 | 1982-09-30 | ||
US430,851 | 1982-09-30 | ||
US06/445,499 US4523307A (en) | 1982-11-30 | 1982-11-30 | Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones |
US445,499 | 1982-11-30 | ||
US432,400 | 1989-11-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1216689A true CA1216689A (fr) | 1987-01-13 |
Family
ID=27503791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000437936A Expired CA1216689A (fr) | 1982-09-30 | 1983-09-29 | Systeme de lignes telephoniques supplementaires utilisant les lignes de secteur, avec transmission de signaux codes entre les postes telephoniques, tele- conferences en duplex, garde d'appels, lignes supplementaires multi-telephones et interphone |
Country Status (2)
Country | Link |
---|---|
KR (1) | KR920002802B1 (fr) |
CA (1) | CA1216689A (fr) |
-
1983
- 1983-09-29 CA CA000437936A patent/CA1216689A/fr not_active Expired
- 1983-09-30 KR KR1019830004673A patent/KR920002802B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR920002802B1 (ko) | 1992-04-03 |
KR840006274A (ko) | 1984-11-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |