Dual-channel analog door entry system and a method thereof
US9042533B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2012 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Apr 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/186
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a dual-channel analog door entry system and a method thereof. The dual-channel analog door entry system comprises two cables connected between the building gateway and the floor distributors, configured to transmit audio and/or video signals between the outdoor stations and indoor phones; the building gateway, configured to receive a call request from at least one of the outdoor stations, identify and assign an available cable as an intercom channel, send the call request to each of the floor distributors via the intercom channel, and switch the audio and/or video signals from the outdoor station to the available cable; at least one of floor distributors, configured to receive and forward the call request to a desired indoor phone, receive a call response from the desired indoor phone if the desired indoor phone is available, and switch the audio and/or video signals from the available cable to the desired indoor phone. The solutions of the present invention achieves great improvement on line busy probability for large buildings and communities; and the solution is smart and simple to implement with low additional cost for reconstruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.