Routing Principles and Guidance for Universal Personal Telecommunications (UPT) - Telephone Network and ISDN - Operation Numbering Routing and Mobile Service (Study Group 2) 13 pp
This Recommendation identifies the international call routing principles and guidance in the user plane for the restricted short-term UPT service scenario, the basic UPT service scenario and the beginnings of the enhanced UPT service scenario which are applicable to UPT InCalls, UPT OutCalls and UPT to UPT calls.