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ETSI TS 100 594
M00001163
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ETSI TS 100 594 Digital cellular telecommunications system (Phase 2+); BSC-BTS Layer 1; Structure of Physical Circuits (3GPP TS 08.54 version 8.0.1 Release 1999)
standard by European Telecommunications Standards Institute, 05/01/2002
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The use and general aspects of the A-bis interface are given in Technical Specification 3GPP TS 08.51.The present document defines the structure of the physical layer (layer 1) of the BSC - BTS/TRX interface forsupporting traffic channels and control channels. Use of the physical layer for supporting link protocol is covered inTechnical Specification 3GPP TS 08.56.
The physical layer is the lowest layer in the OSI Reference Model and it supports all functions required for transmissionof bit streams on the physical medium.
For the present document only digital transmission will be considered, the use of analogue transmission is a nationalconcern.