This Recommendation defines stage one of the broadband virtual path service for reserved and permanent communications (BVPS) for the public broadband integrated services digital network (B-ISDN).
This Recommendation does not specify the additional requirements where the service is provided to the user via a telecommunication network that is not the B-ISDN, but does not preclude requirements for interworking between other networks and the B-ISDN.
The BVPS allows the transfer of unrestricted information between user-to-network reference points (UNRPs).