Main Features - Siemens BS-240 Technical Description

Technical Description (TED:BSS)
BS-240/241
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Main Features

The BS-240/241 is designed for max. 24 carriers in 3 Racks/Shelters plus Service
Racks/Shelters, if needed. The minimum configuration is one Rack or one Shelter with
a Service Rack/Shelter. Service Racks/Shelters can be configured to accommodate
Backup Batteries and Link Equipment. A Service Rack/Shelter can be equipped with
AC/DC Converters. Easy Rack/Shelter Extension is possible with one or two Extension
Racks/Shelters.
The BS-240/241 can be configured for the systems GSM 850, GSM 900, GSM 1800 and
GSM 1900 with the following configurations:
– Single band
– Dual band: GSM 900, GSM 1800; GSM 900, GSM 1900; GSM 850, GSM 1800 and
GSM 850, GSM 1900 :
– GSM 900, GSM 1800 cell mixed frequencies
– Common BCCH channel for GSM 900, GSM 1800 cell (dual band)
– Single cell
– Multi cell
Up to 6 cells per Rack and up to 12 cells can be supported. A special case is the feature
"concentric cell"; one cell with 2 supply areas (inner and complete area). This feature
can be used in omnicells as well as in multicells with sectors.
The following combining options are supported:
– Antenna combining with CU pairs to apply transmission diversity time delay.
– Antenna combining with duplexers (DUAMCO) can be applied for 2, 4 and 8 carriers.
RF amplifier and multicoupler for the RX path are integrated
– Antenna combining with Filter Combiners (FICOM) is possible for up to 8 carriers
onto one TX antenna
– Cascading of multicoupler equipment (DIAMCO) is possible for up to 24 carriers
– High Power Duplexer (HPDU) for reduction of the necessary numbers of antennas
in case of FICOM per cell for up to 8 carriers can be applied
– Every BTSE has core equipment in the Base Rack/Shelter
– Sensitivity is better than GSM requirements at the Rack entry by using DUAMCO or
DIAMCO units
– BTSplus sensitivity is better than GSM requirements at the antenna connector by
using Tower Mounted Amplifiers (TMA)
– EDGE Carrier Units (ECU)
– Mixed Configurations of Cells/Sectors applying both EDGE Carrier Units (ECU) and
"normal" Carrier Units (CU)
Traffic Channels:
– Full-Rate (FR)
– Half-Rate (HR)
– Enhanced Full-Rate (EFR)
– Adaptive Multi Rate Codec (AMR)
Services:
– GPRS
– HSCSD
– EDGE
Frequency Hopping:
– Baseband
– Synthesizer
Information
Base Station System
A30808-X3247-L14-2-7618