ZTE Corporation ZXG-BTS2 Benutzerhandbuch
Voltage.................................................................................................................................20
Power Consumption ..............................................................................................................20
Environmental Conditions...................................................................................... 21
Temperature and Humidity Requirements ..............................................................................21
Grounding Requirements.......................................................................................................21
Atmospheric Pressure Requirements ......................................................................................21
Lighting ................................................................................................................................21
Air Pollution...........................................................................................................................21
Interface Indices................................................................................................... 21
Abis Interface Indices ............................................................................................................21
Um Interface Indices .............................................................................................................22
Capacity Indices ................................................................................................... 24
Clock Indices........................................................................................................ 25
Reliability Indices.................................................................................................. 25
Chapter
3
................................................................................... 27
Interfaces and Communications............................................................. 27
Overview ............................................................................................................. 27
Interfaces ............................................................................................................ 28
Abis Interface........................................................................................................................28
Um Interface.........................................................................................................................31
Inter-Rack Cascaded Interface of Same Site...........................................................................33
Interface with External Environment Monitoring System..........................................................34
Interfaces of Tower Amplifier System .....................................................................................34
Man-Machine Interface (MMI) ................................................................................................35
Protocol Overview................................................................................................. 35
Um Interface Physical Layer...................................................................................................35
LapD Protocol........................................................................................................................48
LapDm Protocol.....................................................................................................................50
RR/MM/CM Protocol...............................................................................................................53
Chapter
4
................................................................................... 55
System Functions .................................................................................... 55
Overview ............................................................................................................. 55
Major RF Functions ............................................................................................... 55
High Receiving Sensitivity ......................................................................................................56
Flexible Configuration ............................................................................................................56
Easy O&M .............................................................................................................................56
Diversity Receiving ................................................................................................................56
Frequency Hopping ...............................................................................................................56