Summary

This amendment to Recommendation Q.2957.1 has been prepared to enable the transfer of additional information that is usable for the control of the operation of the Internet Protocol over switched VC connections. Recommendation Q.2957.1 defines the operation of the Digital subscriber Signalling System No. 2 (DSS2) for the support of the User-to-User Signalling (UUS) supplementary service at the T_B or the coincident S_B and T_B reference point of the user to network interface of the Broadband Integrated Services Digital Network (B-ISDN).