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BS11 » History » Version 3

laforge, 02/19/2016 10:48 PM
add note about what a BTS is

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The Siemens BS-11 is a relatively small [[GSM]] [[BTS]], sometimes known as Siemens microBTS.
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Please note: *The BS-11 is not a GSM Base Station*.  It is a *GSM Base _Transceiver_ Station* and only one element out of the
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quite complex GSM network.  The station itself can only send and receive data on the GSM frequencies.  You need to emulate at least 
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the BSC, MSC and HLR/VLR to be able to use GSM phones with the BS-11. [[OpenBSC]] is a project trying to implement the minimal neccessary parts as Free Software
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BS-11 was originally developed and manufactured by OTE in Firenze, Italy.  The entire product was then later sold to Siemens SBS.
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The BS-11 is available in a variety of configurations.  Variations include
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* power supply
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* AC power supply 110/220V
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* 48V DC power supply
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* number of [[TRX]]
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* one TRX
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* two TRX
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* each of the TRX can be located in different bands
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* GSM900
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* GSM1800
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The uplink of the BS-11, much like most BTS, is a E1 / PCM30 interface, with the [Abis] protocol on top. 
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Original Documentation to the BS-11 is only available under NDA.
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External links:
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* [http://laforge.gnumonks.org/photoalbum/devices/bs11-disassembly] photographs of disassembled BS-11
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