This Recommendation describes the Multimedia Conference Services supported by an ISDN. It relies on Recommendation F.702 for the main body of the description, and only gives the specific complements relevant to the ISDN, which derive from its capabilities and its limitations. Thus when reading this Recommendation, it is necessary to refer back to Recommendation F.702. The numbers of the clauses are those of Recommendation F.702, and thus they do not form a continuous sequence because only a few clauses need a specific complement for the ISDN. In addition there is a new clause 9 on the attributes for the various profiles.