Telephone exchange

https://www.wikidata.org/wiki/Q256132

Field Hierarchy

Parent
Computer science 61.9M papers	Engineering 25M papers	Electrical engineering 4.8M papers	Telecommunications 4.5M papers
Computer network 2.4M papers	Telephony 9,524 papers	Telephone network 4,497 papers	Telephone line 4,168 papers
Current
Telephone exchange 1,316 papers
Child
Softswitch 963 papers

Trends

Notes

History