Automatic switching system
In data communications, an automatic switching system is a switching system in which all the operations required to execute the three phases of information-transfer transactions are automatically executed in response to signals from a user end-instrument.[1]
In an automatic switching system, the information-transfer transaction is performed without human intervention, except for initiation of the access phase and the disengagement phase by a user.[2]
In telephony, it refers to a telephone exchange in 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.
References
- ^ Malthaner, W. A.; Vaughan, H. Earle (May 1952). "An experimental electronically controlled automatic switching system". The Bell System Technical Journal. 31 (3): 443–468. doi:10.1002/j.1538-7305.1952.tb01391.x. ISSN 0005-8580.
- ^ Glover, S. (November 1966). "Automatic Switching at the Edmonton Television Studios". Journal of the SMPTE. 75 (11): 1089–1092. doi:10.5594/J05892. ISSN 0361-4573. Archived from the original on June 24, 2022.