This paper provides a view of the next generation switching (NGS) syst
em maintenance operations model based on potential switching technolog
ies. Several potential benefits of the NGS system maintenance over tod
ay's switch maintenance are discussed with emphasis on functions but n
ot on costs. A set of maintenance functions required for the NGS syste
m is provided, using the LSSGR and OTGR as guidelines. The definition
associated with each maintenance function is also presented. Finally,
issues related to the NGS module structure and definition are identifi
ed and discussed because the progress of the overall NGS work is large
ly dependent on the resolution of these issues. The purpose of this wo
rk is twofold: (i) to place switch maintenance functions into the NGS
operations model; and (ii) to provide a guideline for further defining
switch maintenance functions which are/will be unique to NGS.