Page 700 - Cloud computing: From paradigm to operation

3 XaaS

Annex A

OSS reference points
(This annex forms an integral part of this Recommendation.)

This annex describes reference points related to OSS whose functional components are described in
clause 8.3 of the NaaS functional architecture.
Figure A.1 identifies the reference points internal to the OSS (reference points labelled as ''oss'') as well as
reference points between the OSS and external entities.

For a NaaS service that involves either a ''legacy'' (i.e., non-virtualized) network functions (i.e., PNFs), the
''OSS for NaaS services'' will interact with the OSS (called ''legacy OSS'' in Figure A.1) responsible for the
management of these ''legacy'' network functions. The ''OSS legacy'' system typically includes management
systems such as network management systems (NMSs) or element management systems (EMSs).

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