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= OsmoBTS =

OsmoBTS is a BTS-side A-bis/IP, RTP and LAPDm implementation.

It is building up on work done previosuly for [wiki:OpenBSC] (RSL, OML, RTP) and [ OsmocomBB] (LAPDm).

OsmoBTS is written in a re-targettable way, i.e. it should be relatively easy to target a new BTS hardware (i.e. BTS-side Layer 1) with it.

Hardware support

At the moment, OsmoBTS is under heavy development. So far it supports an upcoming femto-BTS product called SysmoBTS which is not yet publicly available.

A pretty crazy experimental BTS hardware based on two OsmocomBB phones had originally been supported, but needs to be re-integrated with core code changes

We are planning OpenBTS integration, enabling support for USRP style hardware at some future point.

Source code

The source code is available from (module osmo-bts).

Public read-only access is available via
git clone git://
You can browse it via cgit:


OsmoBTS was developed mainly by Andreas Eversberg and Harald Welte.