GT
Global Title
The Global Title is an address used for routing in an SS7 network. The GT is used by the higher levels of SS7 (ISUP (ISDN User Part) TUP (Telephone User Part) SCCP (Signalling Connection Control Part) etc.) however a translation to point code is required at MTP (Message Transfer Part). The SCCP translation will also provide a SSN (Subsystem Number).