OSLEC installation with DAHDI

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

Downlaod 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