The defines textual conventions used by to manage
devices related to the SS7 network.  The
relevant ITU documents describing this technology is
the ITU Q series, including ITU Q.700: Introduction to
CCITT Signalling System No. 7 and ITU Q.701 Functional
description of the message transfer part (MTP) of
Signalling System No. 7.

Abbreviations:
CDPA  - Called Party Point Code
CGPA  - Calling Party Point Code
CLLI  - Common Language Location Codes
CR    - Connection Request message
CREF  - Connection Refusal message
DPC   - Destination Point Code
ERR   - Error message
GTA   - Global Title Address 
GTI   - Global Title Indicator
GTT   - Global Title Translation
LUDT  - long unitdata message
LUDTS - long unitdata service message
M2PA  - MTP2 Peer-to-Peer Adaptation Layer
M3UA  - MTP3-User Adaptation 
MAP   - Mated Application Table
MSU   - Message Signal Unit 
MTP   - Message Transport Protocol
MTP2  - Layer 2 of Message Transport Protocol
MTP3  - Layer 3 of Message Transport Protocol
NAI   - Nature of Address Indicator
NP    - Numbering Plan         
NTT   - The Japanese Nippon Telephone & Telegraph 
OPC   - Originating Point Code
PC    - Point Code
RTN   - Route Table Name
RSR   - Reset Request message
SCCP  - Signalling Connection Control Part
SCTP  - Stream Transmission Protocol(RFC 2960)
SI    - Signalling Indicator
SP    - Signalling Point
SLC   - Signalling Link Code
SLS   - Signalling Link Selector
SSN   - Subsystem Number
SUA   - SCCP-User Adaptation 
TFR   - Transfer Restricted messages  
TT    - Title Translation
TTC   - The Japanese Telecommunications Technology 
  Committee 
UDT   - unitdata message
UDTS  - unitdata service message
XUDT  - extended unitdata message
XUDTS - extended unitdata service message