1) Telephony equipment
Found on
https://www.crosswordclues.com/clue/carterfone
The Carterfone is a device invented by Thomas Carter. It manually connects a two-way radio system to the telephone system, allowing someone on the radio to talk to someone on the phone. This makes it a direct predecessor to today`s autopatch. The device was acoustically, but not electrically, connected to the public switched telephone network. It....
Found on
http://en.wikipedia.org/wiki/Carterfone
No exact match found.
