Telecom Dictionary

IC - Incoming Call
OG - Outgoing Call
MOC - Mobile Originated Call
MTC - Mobile Terminated Call
POC - PSTN Originated Call
PTC - PSTN Terminated Call
MSISDN - Mobile Station International Standard Dialling Number
MSC - Mobile Switching Centre
IDD - International Direct Dial
USSD - Unstructured Supplementary Service Data
IMEI - International Mobilestation Equipment Identity
IMSI - International Mobilestation Subscriber Identity
LTE - Long Term Evolution
CSFB - Circuit Switched Fall Back
APN - Access Point Name
PDP - Packet Data Protocol
PLMN - Public Land Mobile Network
SMPP - Short Message Peer to Peer
IAC - International Access Code

TADIG - Transferred Account Data Interchange Group
TAP - Transferred Accounts Procedure
RAP - Returned Accounts Procedure
IOT - Inter Operator Tariff
RP - Roaming Part
TTT - TAP Testing Toolkit
IREG - International Roaming Expert Group
TCC - TAP Clearance Certificate
ICC - IREG Completion Certificate
CLL - Commercial Launch Letter
SDR - Special Drawing Rights

CAMEL - Customised Applications for Mobile Networks using Enhanced Logic
CAP - CAMEL Application Part
AMA - Automatic Message Accounting
MSA - Multi Server Architecture
SDP - Service Delivery Platform
ECGS - Ecommerce Gateway Server

CB - Call Barring
BAOC - Barring of All Outgoing Calls
BOIC - Barring of outgoing International Calls
BOIC exHC - Barring of outgoing International Calls except to home PLMN country
CFB - Call Forwarding Busy
CFNRy - Call Forwarding No Reply
CFNRc - Call Forwarding on Non Reachable
CW - Call Waiting
CH - Call Hold
MPTY - Multi Party
AOCI - Advice of Charge ( Information )
AOCC - Advice of Charge ( Charging )
VLR - Visitor Location Register
HLR - Home Location Register
ODB - Operator Determined Barring