Telephone User Part (TUP) [Under SS7]
TUP is used for circuit connection setup and tear down. Initially SS7 used TUP instead of ISUP, later however TUP was found to be limited in comparison to ISDN in terms of capabilities (flexibilities). And so ISUP was added to SS7 an alternative to TUP. TUP has been defined in Q.721 thru Q.725. It was mainly used in European countries. It is also being used in China. TUP has been replaced by ISUP in most of the world. TUP is not dealt here.
SS7 points and their protocol layers [Under SS7]
Below diagram shows SS7 points with their protocol layers.
This complete the brief on SS7.
References: Q.700 (SS7), SS7 book by Russell.
© Copyright Samir Amberkar 2010
| ISUP - 2 « | SS7 Index | . |