Foreword

08.563GPPBSC-BTS Layer 2SpecificationTS

This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).

The present document defines the link layer used for signalling on the A-bis interface between the Base Station Controller (BSC) and the Base Transceiver Station (BTS) within the digital cellular telecommunications system (Phase 2/Phase 2+).

The contents of the present document is subject to continuing work within 3GPP and may change following formal 3GPP approval. Should 3GPP modify the contents of the present document it will be re-released with an identifying change of release date and an increase in version number as follows:

Version 8.x.y

where:

8 GSM Phase 2+ Release 1999;

x the second digit is incremented for all other types of changes, i.e. technical enhancements, corrections, updates, etc.;

y the third digit is incremented when editorial only changes have been incorporated in the specification.