【資料名稱(chēng)】：FUNCTIONAL UNIT DESCRIPTIONS For HLRi

【資料作者】：不詳

【資料日期】：不詳

【資料語(yǔ)言】：中文

【資料格式】：DOC

【資料目錄和簡(jiǎn)介】：

Introduction to functional unit descriptions

The following chapters contain descriptions of the functional unit types used in the HLRi. Each description includes the information on the basic configuration of the functional unit and the expansion possibilities, if such exist. The unit descriptions are presented in alphabetical order. The following functional units are used in the HLRi:

Authentication Center Unit, ACU
Basic Data Communications Unit, BDCU
Central Memory and Marker, CMM
Clock System, CLS
Common Channel Signalling Unit, CCSU
Database distributor Unit, DBDU
Equipment Identity Register, EIR, including:
-Equipment Main Unit, EMU
-Equipment Identity Register Unit, EIRU
Exchange Terminal, ET
Group Switch 512, GSW 512
Home Location Register Unit, HLRU
Message Bus, MB
Operation and Maintenance Unit, OMU
Power Distribution Fuse Unit, PDFU
Statistical Unit, STU
Storage device cartridges, SD3C-A and SD4C-A.