Acronyms

The following table provides information about the acronyms and the terminology used in the document.

Table - Acronyms

Acronym	Definition
AC	Area Code
CAS	Customer Access Support
DPC	Destination Point Code
GTA	Global Title Address
GTT	Global Title Translation
HLR	Home Location Register
IEC	International Escape Code
LNP	Local Number Portability
MDN	Mobile Directory Number
MNPCRP	MNP Circular Route Prevention
MTP	Message Transfer Part
NEC	National Escape Code
NP	Number Portability
RN	Routing Number
RTDB	Real Time Database
SCCP	Signaling Connection Control Part
SMSC	Short Message Service Center
SR	Service Request
SRF	Signaling Relay Function
UDT	Unit Data Transfer
XUDT	Extended Unit Data Transfer