Reference Manual

Table Of Contents
Glossary
HMS Heat Management System
Hum Humidity
HW HardWare
HWU Hardware Unit
An HWU consists of one or more SEs. An
HWU is a functional unit within the RBS.
The HWU is either active (equipped with a
processor) or passive (without processor).
IC Integrated Circuit
ID IDentication
IDB Installation Data Base
IDM Internal Distribution Module
IEC International Electric Commission
IMSI International Mobile Subscriber Identity
INIT Initial
INT Internal
IOG Input/Output Group
IOM Internal Operation and Maintenance bus
IR InfraRed
IS Interface Switch
IWD InterWork Description
I1A Internal Fault Map Class 1A
I1B Internal Fault Map Class 1B
I2A Internal Fault Map Class 2A
JTC Joint Technical Committee
LAPD Link Access Procedures on D-channel
LAPD is the data link layer (layer 2)
protocol used for communication between
the BSC and the BTS on the Abis
interface.
Abis layer 2 is sometimes used
synonymously with LAPD.
LBO Line Build Out
EN/LZT 720 0008 R1A
2001-06-26
413 (421)
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