- E-GSM (extended Global System for Mobile comuunication)
- E-mail (electronic mail)
- E-TDMA (Enhanced TDMA)
- E911 (Enhanced 911)
- Earth station
- Eb/No (Bit Energy-to-Noise Density)
- ECO Test (Effective Competitive Opportunities Test)
- Economic Area (EA)
- EDACS (Enhanced Digital Access Communications System)
- EDGE (Enhanced Data for GSM Evolution )
- EFR (Enhanced Full Rate)
- EHF (Extremely High Frequency)
- EIA (Electronic Industry Association)
- EIRP (Effective Isotropic Radiated Power)
- Electromagnetic Compatibility (EMC)
- Electromagnetic Field (EMF)
- Electromagnetic Interference (EMI)
- Electronic Assistant
- Electronic Serial Number (ESN)
- Electronic switching
- Emission
- Encryption
- End office
- Enhanced service
- Enhanced Specialized Mobile Radio (ESMR)
- EPOC
- Equalization
- Equipment Identity Register (EIR)
- ERMES (European Radio Messaging System)
- Error correction
- Error distribution
- Error probability
- Error vector
- Ethernet
- ETSI (European Telecommunications Standard Institute)
- Exchange
- Existing site
- Extranet
- Extremely Low Frequency (ELF) Radiation
E
