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Glossary

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E1 Signals

An E1 link operates over coaxial cable or a balanced pair. A nominal 3 volt peak to peak signal is encoded with pulses using a method avoiding long periods without polarity changes. The line data rate is 2.048 Mbit/s (full duplex). The CEPT originally standardized the E-carrier system, which revised and improved the earlier American T-carrier technology, and this has now been adopted by the ITU-T.