Purpose
This chapter provides information about the Telephone User Part (TUP), which is a module within the SS7 stack that defines the telephone signaling necessary for the processing of international and national calls. Like ISUP, the term "user" in the context of TUP refers to any functional entity that uses the transport capability provided by SS7’s Message Transfer Part (MTP). TUP is flexible enough to handle most required national and international parameters. The Excel TUP interface includes the ability for the host to manage the TUP Virtual CIC call control and circuit management. The Excel TUP includes the SSUTR2 variant which is used to define the signaling interface between a fixed network and a mobile network.
More Information
See the Appendix at the end of this book for tables of TUP-supported messages, Field IDs for supported fields and restrictions on the implementation of TUP messages.