This Recommendation provides the requirements for the distributed call and connection management for both the User Network Interface (UNI) and the Network Node Interface (NNI). The requirements in this Recommendation specify the communications across interfaces to effect automated call operations and connection operations. Items covered in this Recommendation include:

Attribute specifications;

Message specifications;

Signal flows;

DCM state diagrams;

Management of DCM.

This Recommendation does not cover any aspects related to routing or automatic discovery.