Autopatch

A phone patch is the makeshift compound of a radio station to the telephone network.

This allows the wireless connection of subscribers are used that are not staying at the radio station, and the remote radio station are telephone connections. Since the radio normally, unlike the phone, no full duplex is possible, the parties to the call must each specify when the other is speaking, for example, " respond " to the prompt or "over". Mithörende the operator at the radio station with the PhonePatch then actuates the transmit-receive switch.

Phone patches are typically used on short wave for marine radio or ATC, or by amateur radio operators during emergency radio. The Military Affiliate Radio System mediated for U.S. soldiers overseas as telephone conversations with their relatives in the United States, as to the Internet was not yet available.