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2. Video door-phone - Wikipedia

   en.wikipedia.org/wiki/Video_door-phone

   A video door-phone (also known as a video door entry or video intercom) is a stand-alone intercom system used to manage calls made at the entrance to a building ( residential complex, detached family home, workplace, etc.) with access controlled by audiovisual communication between the inside and outside. The main feature of video door entry is ...

3. Smart doorbell - Wikipedia

   en.wikipedia.org/wiki/Smart_doorbell

   The smart doorbell lets the home owner use a smartphone app to watch and talk with the visitor by using the doorbell's built-in high-definition infrared camera and microphone. They can be either battery operated or wired. [1] Some smart doorbells also allow the user to open the door remotely using a smart lock. [2]

4. Door phone - Wikipedia

   en.wikipedia.org/wiki/Door_phone

   A door phone or door bell phone is a set of electrical and electronic elements used to handle communication between a resident in a house, apartment or villa and a guest outside. The device can also lock or unlock the door it has been configured to work with. Door phones have been used across a variety of commercial and residential buildings.

5. List of video telecommunication services and product brands

   en.wikipedia.org/wiki/List_of_video...

   A typical low-cost webcam (a Microsoft LifeCam VX-3000) for use with many popular video-telecommunication programs (2009). This list of video telecommunication services and product brands is for groupings of notable video telecommunication services, brands of videophones, webcams and video conferencing hardware and systems, all related to videotelephony for two-way communications with live ...

6. List of mobile network operators in Canada - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   As of March 2021, there are over 33 million wireless subscriptions in Canada. [1] Approximately 90% of Canadian mobile phone users subscribe to one of the four largest national telecommunication companies (Rogers Wireless, Bell Mobility, Freedom Mobile and Telus Mobility) or one of their subsidiary brands.

7. Andersen Corporation - Wikipedia

   en.wikipedia.org/wiki/Andersen_Corporation

   Andersen is a private company headquartered in Bayport, Minnesota. [1][2] Andersen ranked #146 on Forbes List of America's Largest Private Companies, with $3 billion in annual sales for fiscal year ending December 31, 2021, [1][3] and #185 on Forbes list of America's best large employers in 2022. [4] Andersen Corporation and its affiliates make ...