This Recommendation describes the support of the Broadband Connectionless Data Bearer Service (BCDBS) by the B-ISDN. It describes the framework for network support of BCDBS and the protocols used at the user interface and network interface. This Recommendation relates to the direct provision of the BCDBS as defined in Recommendation I.211 using connectionless service functions. However, aspects of this Recommendation can be applied also to the indirect provision of the BCDBS.