This Recommendation
specifies the broadband connectionless data bearer service. This is a public
packet-switched service that provides for the transfer of variable-length data
units at high speed without the need for call establishment procedures between
users. These data units can be transferred from a single source to a single
destination, or from a single source to multiple destinations. Each data unit
includes a source address validated by the network. One generic feature of a
B-ISDN connectionless bearer service is that it may include broadcasting
capabilities. The service uses addresses based on the E.164 ISDN numbering
plan.