CA2131905A1 - A monitoring phone system - Google Patents
A monitoring phone systemInfo
- Publication number
- CA2131905A1 CA2131905A1 CA 2131905 CA2131905A CA2131905A1 CA 2131905 A1 CA2131905 A1 CA 2131905A1 CA 2131905 CA2131905 CA 2131905 CA 2131905 A CA2131905 A CA 2131905A CA 2131905 A1 CA2131905 A1 CA 2131905A1
- Authority
- CA
- Canada
- Prior art keywords
- unit
- monitoring
- code
- transmitting
- units
- 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.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/06—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using power transmission lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0291—Door telephones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/106—Adaptations for transmission by electrical cable for domestic distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/108—Adaptations for transmission by electrical cable the cable being constituted by a pair of wires
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
- H04N7/186—Video door telephones
-
- 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
- H04B2203/5441—Wireless systems or telephone
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Alarm Systems (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI921098A FI921098A (fi) | 1992-03-13 | 1992-03-13 | Oevervakningstelefonsystem |
FI921098 | 1992-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2131905A1 true CA2131905A1 (en) | 1993-09-16 |
Family
ID=8534921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2131905 Abandoned CA2131905A1 (en) | 1992-03-13 | 1993-03-15 | A monitoring phone system |
Country Status (3)
Country | Link |
---|---|
CA (1) | CA2131905A1 (fi) |
FI (1) | FI921098A (fi) |
WO (1) | WO1993018594A1 (fi) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1275229B (it) * | 1995-02-09 | 1997-07-31 | Bticino Spa | Videocitofono che consente la selezione di porzioni del campo di ripresa la loro memorizzazione ed il loro ingrandimento |
ES2122849B1 (es) * | 1995-03-03 | 1999-10-01 | Fernandez Minaya Miguel Angel | Mirilla electronica para puerta de acceso a vivienda y visionado en televisor domestico. |
CN1045239C (zh) * | 1996-03-30 | 1999-09-22 | 重庆今诚科技开发有限公司 | 电力相间载波广播方法 |
DE19738784C2 (de) * | 1997-09-04 | 1999-07-01 | Loh Kg Ritto Werk | Anlage mit einer Türstation und mehreren Wohnungsstationen, die über eine Bus-Zweidrahtleitung miteinander verbunden sind |
JP2000332908A (ja) * | 1999-05-17 | 2000-11-30 | Kyocera Corp | 携帯テレビ電話端末 |
RS54947B1 (sr) | 2013-02-06 | 2016-11-30 | Comau Spa | Kolica za prenos kontejnera za delove ili komponente u industrijskom postrojenju |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3093706A (en) * | 1958-02-25 | 1963-06-11 | Electronic Measurement Systems | Television system |
GB8606881D0 (en) * | 1986-03-20 | 1986-04-23 | Musical Electronics Ltd | Video distribution system |
US4912553A (en) * | 1986-03-28 | 1990-03-27 | Pal Theodore L | Wideband video system for single power line communications |
FR2634338A1 (fr) * | 1988-07-18 | 1990-01-19 | Milly Lucien | Procedes et materiels, a la fois perfectionnes, simplifies et economiques de television dite " par cables " |
WO1990004306A1 (en) * | 1988-10-13 | 1990-04-19 | International Media Communications Plc | Signal transmission |
-
1992
- 1992-03-13 FI FI921098A patent/FI921098A/fi not_active Application Discontinuation
-
1993
- 1993-03-15 WO PCT/FI1993/000092 patent/WO1993018594A1/en active Application Filing
- 1993-03-15 CA CA 2131905 patent/CA2131905A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
FI921098A0 (fi) | 1992-03-13 |
WO1993018594A1 (en) | 1993-09-16 |
FI921098A (fi) | 1993-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Dead |