Pharmacist circuit

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The pharmacy circuit is a term commonly used in telecommunications for the diversion of a door call from a door hands-free facility (TFE) via a telephone system to an external subscriber .

If someone presses the doorbell button on the intercom, only the telephones of a telephone system in the house will ring without a pharmacy switch. The called party can speak to the visitor at the front door, e.g. B. with a cordless phone from the garden. If the telephone system offers the option of a pharmacy circuit, this has been programmed and activated, a connection via the telephone network to an external subscriber via the telephone network is set up when the doorbell is pressed . This can be a landline connection or a mobile phone . Often, when there is a voice connection, an electric door opener can be activated by dialing a code number from the telephone . Some telephone systems prevent this option of remote opening for security reasons, with some this option must be explicitly enabled.

This particular connection was first used in pharmacies , from which the name of the circuit came about. A pharmacist must then during the call time not the night in the pharmacy spending, but is achieved through the door call the customer also at his home or on the road. The pharmacist must ensure that he can reach the pharmacy quickly when using the pharmacy connection.

literature

  • Helmut Kropp: Contributions to telecommunications. Norderstedt 2015, ISBN 978-3-7347-7884-1 .
  • Oliver Rosenbaum: Expert Practice Lexicon Transmission Technology (ADSL / T-DSL). Expert Verlag, Renningen 2002, ISBN 3-8169-2129-9 .
  • Werner Bärwald: Expert practice lexicon communication technologies. Networks - Services - Applications. Expert Verlag, Renningen 2009, ISBN 978-3-8169-2843-0 .
  • Hubert Zitt: ISDN & DSL for PC and telephone. Verlag Markt + Technik, Munich 2005, ISBN 3-8272-6987-3 .

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