An automatic dial telephone system in which calls are switched by a succession of switches that move a step at a time, from stage to stage, each step being made in response to the dialing of a number. ( 188 )
STEP BY STEP (SXS) SWITCHING SYSTEM
Meaning of STEP BY STEP (SXS) SWITCHING SYSTEM in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012