The result is a functional intercom that you could use pretty much anywhere! The circuit to make two phones work ... to be picked up and audio to be transmitted either way. If you want it to ...

On his blog, [Kenneth Finnegan] recently showed off a replica of a fun toy he used to play with as a kid, a telephone intercom system ... allowing the speakers at either end to hear one another.

RTS Intercom Systems proudly announces the launch of two groundbreaking products set to redefine professional communication: the NOMAD Wireless Intercom and the RVOC Hybrid Cloud Solution. These ...