Reference Manual
Table Of Contents
- RBS 2206 Reference Manual
- Contents
- Preface
- Product Safety Requirements RBS 2000
- Environmental Capabilities
- Scope
- Terminology
- References
- Transport -40 C - +70 C
- Storage -25 C - +55 C
- Handling -40 C - +70 C
- Operation Indoor +5 C - +40 C
- Operation Outdoor -33 C - +40 C
- Operation Outdoor -33 C - +45 C
- Operation Outdoor -33 C - +55 C
- Operation Mast Mounted Equipment -33 C - +45 C
- Operation Mast Mounted Equipment -33 C - +55 C
- Radio Configurations, RBS 2206
- Product Data
- Unit Description, DXU-21
- Unit Description, dTRU
- Unit Decription, CDU-G and CDU-F
- Unit Description, CXU-10
- Unit Description, FCU-01
- Unit Description, DC-Filter 01
- Unit Description, PSU 1200 W
- Unit Description, ACCU/DCCU
- Unit Description, IDM
- Broadcast
- Common Control Channel Handling
- Physical Channel Handling
- Speech and Data Services
- Packet Data Services
- Call Control
- References
- Channel Activation
- Adaptive Frame Alignment
- Asynchronous Handover Detection
- RF Channel Release
- Deactivate SACCH
- Link Establish Indication
- Link Release Indication
- Link Establishment Request
- Link Release Request
- Transparent Message Transmission
- Transparent Message Reception
- SACCH Info Modify
- LAPDm
- Channel Reactivation
- Power Information
- GPRS, Physical Link Layer
- Base Station Power Control
- Channel Measurements
- Discontinuous Transmission
- Frequency Hopping
- Encryption
- Mode Modify
- Mobile Station Power Control
- Short Message Service
- Diversity Supervision
- Synchronization
- Radio Reception
- Radio Transmission
- Frequency Allocation Support
- Restart and Recovery
- Function Change
- Functionality Administration
- Operation and Maintenance Support
- References
- Concepts
- Buttons
- Change RU to Local Mode
- Change RU to Remote Mode
- Change RU to Remote Mode Cancel
- Change SW Power Boost Slave RU to Local Mode
- Loop Control
- RF Loop Test Supervision
- Calendar Time Request
- RSSI Temperature Compensation
- Max Cooling
- Fault Indicator
- BS Fault Indicator
- Operational Indicator
- Tx Not Enabled Indicator
- Local Mode Indicator
- External Alarms Indicator
- DC Disconnected Indicator
- Battery Mode Indicator
- Bat Disconnected Indicator
- AC Fault Indicator
- Test Result Indicators (not used)
- Local Mode in Progress
- Installation Data Handling
- Self Test and Supervision
- Diagnostics and Fault Handling
- Operation and Maintenance Terminal
- External Alarms
- Handling of Auxiliary Equipment
- Climate Protection
- EMC Capabilities
- Transmission Interface Handling G.703 2048 kbit/s
- Transmission Interface Handling DS1 1544 kbit/s
- Terrestrial Link Handling
- Channel Distribution Function
- Transport network O&M functions-DXX Support
- BTS Parameter Limitations
- Glossary
Product Data
Distribution Switch Unit (DXU-21)
The DXU is the central control unit for the RBS. It supports the
interface to the BSC, and it collects and transmits the alarms. The DXU
controls the power and climate equipment for the RBS. It has a
removable compact flashcard which makes it possible to replace a faulty
DXU without the need for loading RBS software from the BSC.
The DXU is also provided with four connections for transmission lines.
It can handle both 2 Mbit (E1) and 1.5 Mbit (T1) PCM links.
The DXU has hardware support for EDGE on 12 TRXs.
Double Transceiver Unit (dTRU)
RBS 2206 has capacity for a maximum of six dTRUs. The dTRU
contains two TRXes for transmission and reception of two radio carriers.
It has a built-in combiner with the optional possibility of combining two
TX signals into one TX output. It is also prepared for four-branch RX
diversity for further improvements in sensitivity.
One version of the dTRU imports only GMSK and the other version
supports both GMSK and EDGE.
Combining and Distribution Unit (CDU)
The CDU is the interface between the transceivers and the antenna
system. All signals are filtered before transmission and after reception
by means of bandpass filters. The CDU allows several dTRUs to share
antennas. There are a maximum of three CDUs in one RBS 2206.
The task of the CDU is to combine transmitted signals from several
transceivers, and to distribute received signal to several transceivers.
The CDU is hardware-prepared to support EDGE.
Two different CDU types are used in RBS 2206 to support all the
configurations.
CDU-F is a filter combiner intended for high capacity solutions. It can
handle up to four transceivers on two antennas. One-, two- and three-
sector configurations are possible in one cabinet with only two antennas
per sector. A combination of three CDU-Fs can handle 12 transceivers
on two antennas.
CDU-G can be configured either for high capacity or for high coverage.
It is a combiner that can be used for synthesizer hopping.
To achieve capacity, CDU-G is used in a configuration where the
hybrid combiner in the dTRU is used. Up to two dTRUs (four
transceivers) can be connected to two antennas. One-, two- and
three-sector configurations are supported.
To achieve maximum coverage, CDU-G is used in a configuration
where the hybrid combiner within the dTRU is not used. Only one
dTRU can be connected to each antenna. The number of dTRUs in an
RBS 2206 cabinet is limited to three in this case.
EN/LZT 720 0008 R1A
2001-06-26
85 (421)
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