From Citizendium, the Citizens' Compendium
- Please sort and annotate in a user-friendly manner and consider archiving the URLs behind the links you provide. See also related web sources.
- Mobile telephone upgrades
- Tom Farley's Telephone History Series
- 1906 telephones and equipment (Swedish) Kungliga Telegrafverkets apparater (Royal Telegraph Administration apparatus) at Project Runeberg - digitized images of telephone and switchboard equipment
- Howstuffworks.com article on telephones
- CBC Digital Archives - Canada Says Hello: The First Century of the Telephone
- Telephone Patents
Bell Labs is a noted telephone equipment research laboratory, amongst its other research fields..