peb20954 Infineon Technologies Corporation, peb20954 Datasheet - Page 5
peb20954
Manufacturer Part Number
peb20954
Description
Smart Integrated Digital Echo Canceller Sidec
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEB20954.pdf
(132 pages)
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PEB 20954
PEF 20954
Introduction
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.
Preliminary Data Sheet
5
04.99
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