System connection

from Wikipedia, the free encyclopedia

A system connection (international: Point-To-Point, PTP) is a connection to a telephone network that is not designed for end devices , but for a telephone system. It is mainly used for business connections. System connections are available in ISDN for basic connections and primary rate connections . A system connection can consist of several of these connections.

Structure of the phone number

The system connection consists of the telephone code , a header or body number and the extension . The numbers of a system connection are usually in a contiguous number block, e.g. B. 100 numbers from 00 - 99. In special cases, several number blocks can be assigned to a system connection.

Number of numbers

A system connection has at least ten telephone numbers. The maximum number of call numbers is determined either from the number of user channels or the number of extensions that are to receive a call number.

literature

  • Dieter Conrads: Telecommunications. Basics - Procedures - Networks, 4th edition, Friedrich Vieweg & Sohn Verlagsgesellschaft mbH, Wiesbaden 2001, ISBN 978-3-528-34589-1 .
  • Hubert Zitt: ISDN & DSL for PC and telephone. Verlag Markt + Technik, Munich 2005, ISBN 3-8272-6987-3 .
  • Wilfried Plaßmann, Detlef Schulz (Hrsg.): Handbook of electrical engineering. 5th edition, Vieweg & Teubner Verlag, Wiesbaden 2009, ISBN 978-3-8348-0470-9 .
  • Werner Bärwald: Expert practice lexicon communication technologies. Networks - Services - Applications, Expert Verlag, Renningen 2009, ISBN 978-3-8169-2843-0 .

Individual evidence

  1. ↑ Structure and design of the number range for local network numbers from March 27, 2013 of the Federal Network Agency

Web links