Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

EWSD

The Elektronisches Wählsystem Digital (EWSD), translated to Electronic Digital Switching System in English, is a widely installed German telephone exchange system, originally introduced in 1975 by Siemens AG, but discontinued in 2017.

History, Measurement & Companies

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around EWSD. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

History

DeTeWeBoschDeutsche TelekomNokiaNokia Networks
5 related topics

Hardware

ISDNBORSCHTV5.2DTMFPCM30
10 related topics

Software

CHILLCommunication software
2 related topics

Overview

Telephone exchangeSiemens AGLandline
3 related topics

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

History

Hardware

Software

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

EWSD

Nodes25
Edges24
Triples35
Avg. degree1.92
Density0.08
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

EWSD

Top relations

related to Hardware · 14
EWSD → All, CCNC, Common Channel Network Control, Coordination Processor, CP, Digital Line Unit, DLU, ISDN Primary Access Unit, Line Trunk Group, LTG, PH, SN, Switching Network, The
related to Software · 11
EWSD → Application, APS, Automatic Program System, Bosch, CHILL, It, Operating, Siemens, Support, The, The APS
related to history · 9
EWSD → Alcatel, Bosch, DeTeWe, Deutsche Bundespost, Deutsche Telekom, Elektronisches Wählsystem Analog, EWSA, German, System
related to External links · 1
EWSD → Osmocom Retronetworking Wiki

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

switching system siemens software telephone dlu digital million lines one isdn data company coordination traffic call operating elektronisches wählsystem german

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
EWSDrelated to External linksOsmocom Retronetworking Wiki0.60section
EWSDrelated to HardwareThe0.60section
EWSDrelated to HardwareCoordination Processor0.60section
EWSDrelated to HardwareCP0.60section
EWSDrelated to HardwareCommon Channel Network Control0.60section
EWSDrelated to HardwareCCNC0.60section
EWSDrelated to HardwareLine Trunk Group0.60section
EWSDrelated to HardwareLTG0.60section
EWSDrelated to HardwareDigital Line Unit0.60section
EWSDrelated to HardwareDLU0.60section
EWSDrelated to HardwareSwitching Network0.60section
EWSDrelated to HardwareSN0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.