What if the videophone doesn't leave a line?

If the videophone doesn't leave a line, you can find a property and ask them to handle it for you.

I suggest you go directly to the property. Generally, wires and telephone lines can be rewired, or you can ask a plumber to solve it for you. To connect the videophone, just connect the video cable, property line and power cord to the videophone. Generally speaking, the property will be installed. And if you install it yourself, there is also a special installation master.

How to install a videophone:

Install the door main frame at a good visual level. Recommended height 150cm. Please do not install the intercom system in direct sunlight, high temperature, snow and ice, chemical corrosion and excessive dust. Generally speaking, all networking wiring should adopt double shielded super-Category 5 wires, and the shielding layer should adopt metal woven net.

Networking wiring adopts series connection mode, and wiring conduit adopts special metal threading pipe as far as possible. Both ends of the tube should be well grounded, and the distance from the high-voltage cable should be more than 50cm, so as to improve the anti-interference and lightning protection ability.