Basic home telephone system

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Has anyone came across an idea similar as follows;

Simple home telephone system with 1 input line. Using home run wiring
(a wire to each phone returning to a closet or similar place) and
regular analog phones, creating a system that could be interfaced with
a front entry intercom, shop or outside intercom, paging feature to
other phones, etc.

The idea is to design something simple that would, upon picking up a
generic phone and dialing a specified key sequence (like #*1) the user
would hear a beep or something that would indicate that the system was
accessed (at that time, that particular phone would be isolated from
the incoming phone line).

Any info would be helpful. Thanks

 

[Ken Taylor]

Has anyone came across an idea similar as follows;

Simple home telephone system with 1 input line. Using home run wiring
(a wire to each phone returning to a closet or similar place) and
regular analog phones, creating a system that could be interfaced with
a front entry intercom, shop or outside intercom, paging feature to
other phones, etc.

The idea is to design something simple that would, upon picking up a
generic phone and dialing a specified key sequence (like #*1) the user
would hear a beep or something that would indicate that the system was
accessed (at that time, that particular phone would be isolated from
the incoming phone line).

Any info would be helpful. Thanks

Commonly called a PABX? Cheap 2-line unit utilizing just one input line
would do exactly this.

Ken