Hi All, I have followed below steps to enable echo cancellation.
# cd /usr/src # wget http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.28.tar.bz2 # tar xjf linux-2.6.28.tar.bz2 # tar zxvf dahdi-linux-2.1.0.4.tar.gz # ln -s /usr/src/dahdi-linux-2.1.0.4 /usr/src/dahdi # mkdir /usr/src/dahdi/drivers/staging # cp -fR /usr/src/linux-2.6.28/drivers/staging/echo /usr/src/dahdi/drivers/staging # sed -i "s|#obj-m += dahdi_echocan_oslec.o|obj-m += dahdi_echocan_oslec.o|" /usr/src/dahdi/drivers/dahdi/Kbuild # sed -i "s|#obj-m += ../staging/echo/|obj-m += ../staging/echo/|" /usr/src/dahdi/drivers/dahdi/Kbuild # echo 'obj-m += echo.o' > /usr/src/dahdi/drivers/staging/echo/Kbuild # cd /usr/src/dahdi # make # make install # cd /usr/src # tar zxvf dahdi-tools-2.1.0.2.tar.gz # cd /usr/src/dahdi-tools-2.1.0.2 # ./configure # make # make install # wget http://www.rowetel.com/ucasterisk/downloads/oslec-0.2.tar.gz # tar xvzf oslec-0.2.tar.gz # cd oslec-0.2 # make # insmod kernel/oslec.ko when i restart /etc/init.d/dahdi service it gives me following error in /var/log/message Mar 3 11:06:37 server1 kernel: echo: exports duplicate symbol oslec_hpf_tx (owned by oslec) Mar 3 11:06:37 server1 modprobe: WARNING: Error inserting echo (/lib/modules/2.6.18-92.1.22.el5/staging/echo/echo.ko): Invalid module format Mar 3 11:06:37 server1 kernel: dahdi_echocan_oslec: Unknown symbol oslec_create Mar 3 11:06:37 server1 kernel: dahdi_echocan_oslec: Unknown symbol oslec_update Mar 3 11:06:37 server1 kernel: dahdi_echocan_oslec: Unknown symbol oslec_free Mar 3 11:06:37 server1 modprobe: FATAL: Error inserting dahdi_echocan_oslec (/lib/modules/2.6.18-92.1.22.el5/dahdi/dahdi_echocan_oslec.ko): Unknown symbol in module, or unknown parameter (see dmesg) # cat /etc/dahdi/system.conf loadzone = in defaultzone = in span=1,1,7,ccs,hdb3 bchan=1-15 dchan=16 bchan=17-31 echocanceller=oslec,1-15,17-31 Is there anything missing or i am going wrong.. Help me out. Thanks in advance... -- Regards, Chandrakant Solanki
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