【资料成文时间】：未知
【语言】：en
【页数】：50
【何人（公司）所著】：nokia
【文件格式】：doc
【文件原名】：MSC/VLR Architecture
【摘要或目录】：
1Objectives5
2Overview of the GSM network architecture and the NSS6
3Architecture8
3.1Block diagram of the MSC/VLR11
3.2Maximum capacity of the VLR (subrack)11
4Hardware12
4.1Racks in the MSC/VLR12
5Units in a DX 200 MSC/VLR14
5.1ET - Exchange Terminal14
5.2ECU – Echo Canceller Unit16
5.3MB - Message Bus17
5.4GSW - Group Switch17
5.5M - Marker18
5.6OMU - Operation and Maintenance Unit19
5.7WDFR – Winchester and Floppy Disk Subrack21
5.8CM - Central Memory22
5.9ANM - Announcement Machine23
5.10VANG - Verbal Announcement Generator23
5.11LSU - Line Signalling Unit24
5.12CCSU - Common Channel Signalling Unit25
5.13BSU - Base Station Signalling Unit26
5.14CCMU - CCS Management Unit27
5.15CASU - Channel Associated Signalling Unit28
5.16PAU - Primary Rate Access unit29
5.17CMU - Cellular Management Unit30
5.18STU - Statistical Unit31
5.19CHU - Charging Unit32
5.20VLRU - Visitor Location Register Unit33
5.21BDCU - Basic Data Communication Unit34
5.22CLSU - Clock and Synchronisation Unit35
5.23CNFU - Conference Unit36
5.24IWCU - Interworking Control Unit37
5.25DASU - Data Service Unit38
5.25.1Modem Pool (MOD-POOL)39
5.25.2Unrestricted Digital Information Pool (UDI-POOL)41
5.25.3Packet Assembler / Disassembler Pool (PAD-POOL)42
5.25.4Local Area Network Pool (LAN-POOL)42
5.25.5Direct Data Access Pool (DDA-POOL)42
5.26CDSU - Compact Data Services Unit43
Appendix: Summary table of MSC/VLR46
References50