sudo apt-get install linux-source build-essential autoconf automake libtool libgsm1-dev libdbi0-dev \
     libdbd-sqlite3 git-core asterisk asterisk-dev ncurses-base libncurses5-dev libncursesw5-dev sqlite3 pkg-config
cd /usr/src
sudo tar xvfj linux-source-2.6.32.tar.bz2
cd linux-source-2.6.32
sudo make oldconfig

cd /lib/modules/2.6.32-24-generic/
sudo ln -s /usr/src/linux-source-2.6.32 source

cd
mkdir openbsc
cd openbsc

git clone git://git.misdn.org/git/mISDN.git/
git clone git://git.misdn.org/git/mISDNuser.git/
git clone git://git.osmocom.org/libosmocore.git
git clone git://bs11-abis.gnumonks.org/openbsc.git
git clone git://git.misdn.org/git/lcr.git/

cd mISDN
./configure
cp mISDN.cfg.default standalone/mISDN.cfg
make modules
sudo make modules-install

cd ../mISDNuser
./configure
make
sudo make install

cd ../libosmocore/
git checkout 43558316bc4e6ddac92dd198b07a4803c21dc77b
autoreconf -i
./configure
make
sudo make install

cd ../openbsc/openbsc/
git checkout 305e2906aae7dbf45204f043394719c9a06c1227
autoreconf --install --force
./configure
make

cd ../../lcr
git checkout 69475c77e1b5eef4f101f0bf108a89d04ccd833b
git checkout mit der Version vom 6 Aug
ln -s ../libosmocore/ .
ln -s ../openbsc/openbsc/ .
sh autogen.sh
wget http://openbsc.osmocom.org/trac/raw-attachment/wiki/OpenBSC_LCR/lcrOpenBSC.patch
git apply --verbose lcrOpenBSC.patch
./configure --prefix=/opt/lcr --with-asterisk --with-gsm-bs
vim gsm_bs.cpp: change on line 60 PACKAGE_VERSION to "1.7"
make
sudo make install

sudo cp chan_lcr.so /usr/lib/asterisk/modules/

cd /usr/local/lcr
sudo vim options.conf  uncomment the following lines:
  debug 0xffff
  lock /var/tmp
  socketuser asterisk
  socketgroup asterisk
  gsm

sudo vim interface.conf
  uncomment the first [GSM] section
add: extern

[GSM]
gsm-bs
nt
layer1hold no
layer2hold no
tones yes
earlyb no
channel-in free
channel-out any
nodtmf


sudo vim gsm.conf
  uncomment both interfaces
  debug DRLL:DCC:DMM:DRR:DRSL:DNM:DSMS:DMNCC:DMNSMS:DPAG:DMUX:DMEAS
  config /usr/local/lcr/openbsc.cfg
  hlr /usr/local/lcr/hlr.sqlite3

sudo vim routing.conf
  on the [extern] section add:
  interface=GSM  remote=asterisk		: remote application=asterisk context=btsctrl
 

sudo vim /etc/asterisk/modules.conf
add under [modules]: load => chan_lcr.so


start lcr:
(sudo modprobe mISDN_core)
sudo modprobe mISDN_dsp
sudo modprobe mISDN_l1loop pri=1 nchannel=8

i couldn't load the l1loop. the following error has appeared (after modprobe mISDN_core and _dsp): FATAL: Module mISDN_l1loop not found.
Solution: sudo depmod -a
After that, i could do sudo modprobe mISDN_l1loop pri=1 nchannel=8

Proof it: sudo misdn_info 

Found 2 ports
  Port  0 'mISDN_l1loop.1':  TE/NT-mode PRI E1  (for phone lines & E1 devices)
                              8 B-channels: 1-8
                                B-protocols: RAW HDLC X75slp L2:DSP L2:DSPHDLC
  --------
  Port  1 'mISDN_l1loop.2':  TE/NT-mode PRI E1  (for phone lines & E1 devices)
                              8 B-channels: 1-8
                                B-protocols: RAW HDLC X75slp L2:DSP L2:DSPHDLC

cd