- Automatic switching system
datacommunications, an automatic switching system is a switching systemin which all the operations required to execute the three phases of information- transfertransactions are automatically executed in responseto signals from a user end-instrument.
In an automatic switching system, the
information-transfer transactionis performed without human intervention, except for initiation of the access phaseand the disengagement phaseby a user.
telephony, it refers to a telephone exchangein which all the operations required to set up, supervise, and release connections required for telephone calls are automatically performed in response to signals from a calling device. This distinction lost importance as manual switching declined during the 20th century.
Wikimedia Foundation. 2010.