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PEB20954 Datasheet(PDF) 5 Page - Infineon Technologies AG |
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PEB20954 Datasheet(HTML) 5 Page - Infineon Technologies AG |
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5 / 132 page  PEB 20954 PEF 20954 Introduction Preliminary Data Sheet 5 04.99 1 Introduction The Smart Integrated Digital Echo Canceller (SIDEC) suppresses echoes in telecommunication networks which might disturb any kind of terrestrial or wireless communication. It incorporates leading edge CMOS technology as well as SIEMENS’ many years’ experience in Telecommunication ICs. In communication links reflections resulting in an electrical echo are due to hybrid splits or imperfect terminations in subscriber loops. Acoustical echoes may occur due to poor isolation of microphone and speaker of some telephone system. These electrical and acoustical echoes disturb the quality of the transmission. To ensure high quality, pure data transmission the ITU-T (International Telecommunications Union, Telecommunication Standardization Sector) suggests in the recommendation G.131 the use of echo cancellers. Echo cancellation is extremely desirable for data links with total round trip transmission times of more than 50 ms. |
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