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OpenBSC is a minimalistic implementation of the GSM Network, with
particular emphasis on the functionality typically provided by the BSC,
MSC, HLR, VLR and SMSC.
Its currently supported interfaces towards the BTS are:
* Classic A-bis over E1 using a mISDN based E1 interface. In other
words, you can connect existing GSM Base Transceiver Station (BTS)
through E1 to OpenBSC. So far, we have only tested the Siemens BS-11
Test reports with other BTS are much appreciated!
* A-bis over IP as used by the ip.access nanoBTS product family
This project is still in its early days, and there are lots of areas where it
doesn't behave as per GSM spec.
Harald Welte <email@example.com>
Please note that as of March 2010, OpenBSC has a dependency to a library
called "libosmocore". You can obtain that library from