- “The European standard (see North American T1). E1 carries information at the rate of 2.048 millions bits per second. E1 30 channels, 2.048 Mbps.”
- Equipment Identification Register The EIR in a GSM Network stores the serial numbers (supplied by manufacturers) of the mobile terminals IMEI.
- European Telecommunications Standards Institute ETSI produce regional telecom signalling protocol standards that are subsequently used in Europe and elsewhere.