![Amazon.com: Wired Intercom Cable, 4 core Cable/4-Core Round Flexible Copper Wire for Video Doorbell Intercom System Color Video Door Phone doorbell 10 M/33 feet 0.3mm² : תעשייה ומדע Amazon.com: Wired Intercom Cable, 4 core Cable/4-Core Round Flexible Copper Wire for Video Doorbell Intercom System Color Video Door Phone doorbell 10 M/33 feet 0.3mm² : תעשייה ומדע](https://m.media-amazon.com/images/I/31w+2E0w67L.jpg)
Amazon.com: Wired Intercom Cable, 4 core Cable/4-Core Round Flexible Copper Wire for Video Doorbell Intercom System Color Video Door Phone doorbell 10 M/33 feet 0.3mm² : תעשייה ומדע
![wiring - Control the door release function of an apartment intercom - Electrical Engineering Stack Exchange wiring - Control the door release function of an apartment intercom - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/sOtbn.jpg)
wiring - Control the door release function of an apartment intercom - Electrical Engineering Stack Exchange
![Amazon.com: TMEZON 15M/50FT RVV4 4 core Cable/4 core Wire for Video intercom Color Video Door Phone doorbell Wired Intercom Cable : Electronics Amazon.com: TMEZON 15M/50FT RVV4 4 core Cable/4 core Wire for Video intercom Color Video Door Phone doorbell Wired Intercom Cable : Electronics](https://m.media-amazon.com/images/I/51u-mFQu5CL._AC_UF894,1000_QL80_.jpg)