Document Title Security Level
2006-10-04 HUAWEI Confidential Page30, Total35
DSAC Signal Access Card for DTRU BTS
DTX Discontinuous Transmission (mechanism)
DTRU Double Transceiver unit
DTMU Transmission & Timing & Management Unit for DTRU BTS
E
EDGE Enhanced Data rates for GSM Evolution
EDU Enhanced Duplexer Unit
EFR Enhanced Full Rate
F
FACCH Fast ACCH
FACCH/F Fast Associated Control Channel/Full rate
FCCH Frequency Correction Channel
FDMA Frequency Division Multiple Addressing
FH Frequency Hopping
FN Frame Number
G
GERAN GSM/EDGE Radio Access Network
GMSC Mobile service Switching Centre
GPRS General Packet Radio Service
GSM Global System for Mobile communications
H
HDLC High level Data Link Control
HDSL High speed Digital Subscriber Line
HLR Home Location Register
I
ID Identification/Identity
IEC International Electrotechnical Commission
IMEI International Mobile Subscriber Identity
IMSI International Mobile Subscriber Identity
ISDN Integrated Services Digital Network
L
L1 Layer 1
L2 Layer 2
L2ML Layer 2 Management Link
L3 Layer 3
LAPB Location Area
LAPD Link Access Protocol on the D channel
LAPDm Link Access Protocol on the Dm channel