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electronic dialing system

The term electronic dialling system (EWS) originates from Siemens and dates back to the 1960s. It refers to an analogue switching system that can be used as an exchange in all hierarchy levels. Depending on the hierarchy level, a letter for local switching or long-distance switching was appended to the acronym

. Forexample, EWSF for long-distance switching, EWSO for local networks or EWSM for city networks

. EWS systems are voice switching systems for analoguetelephone networks, the systems for digital ISDN-based switching are called EWSD (digital).

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Englisch: electronic dialing system
Updated at: 07.11.2020
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