Rattle circuit

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Röchel circuit is a term used in telecommunications and describes the automatic establishment of a telephone connection after lifting the handset to a specified number. The connection is established after a specified time, so that it is also possible to dial a number other than the specified number. The telephone number to which the connection is established no longer needs to be dialed, but has been permanently set in the telephone system via software. The name Röchelschalt refers to the idea that a seriously ill or seriously injured person grabs the phone shortly before passing out, but is no longer able to dial a number . This feature was developed by Standard Elektrik Lorenz (SEL), which for a long time was the only provider of telephone systems with this technology.

See also: Röchelruf