E
EDGE
Enhanced Data rates for GSM Evolution; effectively the final stage in the evolution of the GSM standard, EDGE uses a new modulation schema to enable theoretical data speeds of up to 384kbit/s within the existing GSM spectrum. An alternative upgrade path towards 3G services for operators, such as those in the USA, without access to new spectrum. Also known as Enhanced GPRS (E-GPRS)
EEPROM
Electrically Erasable Programmable Read Only Memory
EFR
Enhanced Full Rate; a alternative voice codec that provides improved voice quality in a GSM network (see codec)
EFT
Electronic Funds Transfer
EGSM
Extended (frequency range) GSM
EIR
Equipment Identity Register; a database that contains a list of all valid mobile stations within a network based on their IMEI
EIRP
Effective Isotropic Radiated Power
EPOC
The mobile phone operating system developed by Symbian. Derived from epoch-the beginning of an era-EPOC is a 32-bit operating environment which comprises a suite of applications, customisable user interfaces, connectivity options and a range of development tools
EPROM
Erasable Programmable Read Only Memory
Erlang
A dimensionless unit of average traffic density in a telecommunications network
ERMES
Enhanced Radio Messaging System; a paging technology developed by ETSI which was intended to allow users to roam throughout Europe. Adopted by a number of European and Middle Eastern countries, ERMES, like paging in general, was overtaken by the ubiquity of GSM
ERO
European Radiocommunications Office
ERP
Effective Radiated Power
ESMR
Enhanced Special Mobile Radio; a US PMR variant (see SMR)
ESN
Electronic Serial Number; a 32-bit number that uniquely identifies a mobile phone
ESPRIT
European Strategic Programme for Research and Development in Information Technology
ETACS
Extended TACS; the extension of TACS by the addition of new frequencies
ETSI
European Telecommunications Standards Institute: The European group responsible for defining telecommunications standards
The Consumer Mobile Glossary
EFR
Enhanced Full Rate (codec); an improved version of the standard voice codec used in GSM phones; offers improved speech quality without impacting on network capacity
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The key on a cellular phone which is pressed to terminate a call
