Difference between revisions of "OSLEC installation with DAHDI"
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= What is OSLEC? = | |||
Oslec is an open source high performance line echo canceller. | Oslec is an open source high performance line echo canceller. | ||
When used with Asterisk it works well on lines where the built-in Zaptel echo canceller fails. <br> | When used with Asterisk it works well on lines where the built-in Zaptel echo canceller fails. <br> | ||
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'''Attention - this manual is addressed to MOR users who are experienced in Linux and Asterisk!''' | '''Attention - this manual is addressed to MOR users who are experienced in Linux and Asterisk!''' | ||
= Download and unpack Dahdi = | |||
cd /usr/src | cd /usr/src | ||
wget http://downloads.asterisk.org/pub/telephony/dahdi-linux/dahdi-linux-current.tar.gz | wget http://downloads.asterisk.org/pub/telephony/dahdi-linux/dahdi-linux-current.tar.gz | ||
tar xvfz dahdi-linux-current.tar.gz | tar xvfz dahdi-linux-current.tar.gz | ||
= | = Download and unpack your Linux kernel sources = | ||
At this stage make sure you download the correct kernel sources | At this stage make sure you download the correct kernel sources | ||
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tar xvfz linux-2.6.28.tar.bz2 | tar xvfz linux-2.6.28.tar.bz2 | ||
= Prepare the downloaded DAHDI sources to compile with OSLEC included = | |||
mkdir /usr/src/dahdi-linux-2.5.0.1/drivers/staging | |||
cp -fR /usr/src/linux-2.6.28/drivers/staging/echo /usr/src/dahdi-linux-2.5.0.1/drivers/staging | |||
sed -i "s|#obj-m += dahdi_echocan_oslec.o|obj-m += dahdi_echocan_oslec.o|" /usr/src/dahdi- linux-2.5.0.1/drivers/dahdi/Kbuild | |||
sed -i "s|#obj-m += ../staging/echo/|obj-m += ../staging/echo/|" /usr/src/dahdi-linux-2.5.0.1/drivers/dahdi/Kbuild | |||
echo 'obj-m += echo.o' > /usr/src/dahdi-linux-2.5.0.1/drivers/staging/echo/Kbuild | |||
= Compile DAHDI and DAHDI tools = | |||
cd / usr/src/dahdi-linux-2.4.1.2 | |||
make | |||
make install | |||
Download and install DAHDI tools | |||
cd /usr/src | |||
wget http://downloads.asterisk.org/pub/telephony/dahdi-tools/dahdi-tools-current.tar.gz | |||
tar xvfz dahdi-tools-current.tar.gz | |||
cd dahdi-tools-2.4.1 | |||
./configure | |||
make | |||
make install | |||
make config | |||
= Check the results = | |||
After everything has been done, run the following command | |||
updatedb | |||
Check if OSLEC was installed: | |||
locate oslec | grep /lib/modules | |||
You should see similar output: | |||
/lib/modules/2.6.18-238.9.1.el5/dahdi/dahdi_echocan_oslec.ko | |||
= See also = | |||
Alternative guide can be found [http://forums.digium.com/viewtopic.php?t=67164 here] | |||
Latest revision as of 08:17, 21 October 2011
What is OSLEC?
Oslec is an open source high performance line echo canceller.
When used with Asterisk it works well on lines where the built-in Zaptel echo canceller fails.
No tweaks like rxgain/txgain or fxotrain are required. Oslec is supplied as GPL licensed C source code and is free as in speech.
More information can be found here
Attention - this manual is addressed to MOR users who are experienced in Linux and Asterisk!
Download and unpack Dahdi
cd /usr/src wget http://downloads.asterisk.org/pub/telephony/dahdi-linux/dahdi-linux-current.tar.gz tar xvfz dahdi-linux-current.tar.gz
Download and unpack your Linux kernel sources
At this stage make sure you download the correct kernel sources
Check the current kernel by using command
[root@linux ~]# uname -a Linux ns205179.ovh.net 2.6.28-grsec-xxxx-grs-ipv6-64 #2 SMP Thu Aug 25 16:40:22 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Next, download the kernel sources
wget http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.28.tar.bz2
Unpack
tar xvfz linux-2.6.28.tar.bz2
Prepare the downloaded DAHDI sources to compile with OSLEC included
mkdir /usr/src/dahdi-linux-2.5.0.1/drivers/staging cp -fR /usr/src/linux-2.6.28/drivers/staging/echo /usr/src/dahdi-linux-2.5.0.1/drivers/staging sed -i "s|#obj-m += dahdi_echocan_oslec.o|obj-m += dahdi_echocan_oslec.o|" /usr/src/dahdi- linux-2.5.0.1/drivers/dahdi/Kbuild sed -i "s|#obj-m += ../staging/echo/|obj-m += ../staging/echo/|" /usr/src/dahdi-linux-2.5.0.1/drivers/dahdi/Kbuild echo 'obj-m += echo.o' > /usr/src/dahdi-linux-2.5.0.1/drivers/staging/echo/Kbuild
Compile DAHDI and DAHDI tools
cd / usr/src/dahdi-linux-2.4.1.2 make make install
Download and install DAHDI tools
cd /usr/src wget http://downloads.asterisk.org/pub/telephony/dahdi-tools/dahdi-tools-current.tar.gz tar xvfz dahdi-tools-current.tar.gz cd dahdi-tools-2.4.1 ./configure make make install make config
Check the results
After everything has been done, run the following command
updatedb
Check if OSLEC was installed:
locate oslec | grep /lib/modules
You should see similar output:
/lib/modules/2.6.18-238.9.1.el5/dahdi/dahdi_echocan_oslec.ko
See also
Alternative guide can be found here
