The use of devices for voice communication, for example, cellular and digital telephone systems.
See the Telephone article for a history of the telephone.
- Cellular telephone systems
- Centrex telephone systems
- Digital telephone systems
- Telephone switching systems
This category has the following 5 subcategories, out of 5 total.
Pages in category "Telephony"
The following 131 pages are in this category, out of 131 total.
Media in category "Telephony"
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