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 4 subcategories, out of 4 total.
Pages in category "Telephony"
The following 133 pages are in this category, out of 133 total.
Media in category "Telephony"
The following 8 files are in this category, out of 8 total.