Routing Principles and Guidance for Universal Personal Telecommunications (UPT) - Telephone Network and ISDN - Operation Numbering Routing and Mobile Service (Study Group 2) 13 pp
The set-up of calls from a UPT user and calls to a UPT user requires routing arrangements to be established. In fixed telecommunication networks, users are associated with the network access point of the terminai. With UPT, the fixed association between t