Recommendation I.210
describes the principles for defining telecommunication services supported by
an ISDN including the concept of bearer services, teleservices and
supplementary services. It also provides the means for the definition and
description of such services. A recommended set of bearer service categories is
defined in Recommendation I.230.
The purpose of this
Recommendation is to describe a recommended set of frame mode bearer services
(FMBS), to describe individual frame mode bearer services and to recommend
their provision in an ISDN.
Bearer services are
described by prose definitions and descriptions, by attributes and their values
and by dynamic descriptions following the description method given in
Recommendation I.130. The application of the attribute technique and the
definition of those attributes and attribute values is given in Recommendation
I.140.
The following set of frame
mode bearer services is currently identified:
I.233.1 ISDN frame relay in bearer service
I.233.2 ISDN frame switching bearer
service.