tronic Embedded Operations Channel. (Bits carried in a Equipment Association. transmission frame which contain auxiliary infor- European Communication Satellite. mation such as for maintenance and supervisory. Exchange Carriers Standards Association. (USA) This is also called a Facilities Data Link, FDL.) ECTEL European Conference of Telecommunications man- End Of Transmission. (Control code used in trans- agers. mission to signal the receiver that all the information ECTRA European Committee for Telecommunications has been sent.) Regulatory Affairs. (Part of CEPT.) European Organisation for Testing and Certifica- ECTUA European Council of Telecommunications Users' tion. Associations. End Office Toll Trunking. (US term for trunks which European Currency Unit. (Monetary unit of the are located between end offices situated in different EEC, created in 1981.) toll areas.) Electronic Data Interchange. (Protocol for inter- Engineering Order Wire. (A channel for voice or changing data between computer based systems.) data communication between two stations on a EDIFACT EDI For Administration Commerce and Transport. transmission line.) (International rules for trading documents, e.g. pur- European Parliment. chase orders, payment orders, etc.) EPHOS European Procurement Handbook for Open Sys- Electronic Data Processing. items. (Equivalent to GOSIP.) Electrical Engineering Association. EPIRB Emergency Position Indicating Radio Beacon. Electronic and business Equipment Association. European Radiocommunications Committee. (Part European Economic Community. of CEPT.) European Electronic Mail Association. European Regional Development Fund. EEPROM Electrically Erasable Read Only Memory. (Inte- Echo Return Loss. grated circuit used to store data, which can be erased Exchange Rate Mechanism. (Used within the Euro- by electrical methods.) pean Community.) Equipment Engaged Tone. (Tone customer receives ERMES European Radio Messaging Service. (pan-European when there is no free line for his call.) standard for paging.) Error Fre