This Technical Specification (TS) has been produced by the Special Mobile Group (SMG).
The present document defines the restoration procedure within the digital cellular telecommunications system.
The contents of the present document are subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the contents of the present document it will then be republished by ETSI with an identifying change of release date and an increase in version number as follows:
7 GSM Phase 2+ Release 1997
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.