Motorola Glossary of Technical Terms
- Mobile telephony, cordless phones, and cellular services. Parallel versions in Czech, Danish, Dutch, French, German, Greek, Hungarian, Italian, Portuguese, Romanian, Russian, Slovak, Spanish, Swedish, and Turkish.
- http://direct.motorola.com/ENG/glossary.asp?country=GBR&language=ENG

Telecom Dictionary
- Commonly used telecom terms and their definitions.
- http://www.carrieraccessbilling.com/telecommunications-glossary-a.asp

Telecommunication Terminology Database
- TERMITE contains all the terms which appeared in ITU printed glossaries since 1980.
- http://www.itu.int/terminology/index.html