BSAP – BSS Application Part
BSSMAP - BSS Management Application Part
BSMAP (Base Station Management Application Part) DTAP (GSM) – Direct Transfer Application sub-Part
BTSM – Base Station Controller to Base Transceiver Station
DTAP (CDMA) – Direct Transfer Application sub-Part
RR – Radio resource
MM – Mobility Management
CC – Call Control
SMS – Short Message Service