Asterisk OSLEC
For those who wish to use OSLEC for echo cancellation instead of the dahdi/zaptel echo canceler, here are the instructions on how to properly install and configure OSLEC.
1) Download Dahdi/Zaptel Sources
2) Install OSLEC
3) Verify OSLEC Installation
Download Dahdi/Zaptel Sources
DAHDI METHOD
First find the version of Dahdi by running the command:
#> dahdi_cfg -vvv
DAHDI Tools Version - 2.2.0
DAHDI Version: 2.2.0
Echo Canceller(s):
Configuration
======================
Now you will notice there will be two versions insure you note down the Dahdi version not the Dahdi-tools version. Then go to http://downloads.digium.com/pub/telephony/dahdi-linux/releases/ and search for your version of Dahdi there. The file name should be in the format "dahdi-linux-<version>.tar.gz". Once you find the version then run the command
#> cd /usr/src/
and then run "wget <<URL of Dahdi-linux>>", so for this version it would be the following command.
#> wget http://downloads.digium.com/pub/telephony/dahdi-linux/releases/dahdi-linux-2.2.0.tar.gz
You would need to compile the dahdi source in order to install the wanpipe driver:
1. Extract the dahdi-linux-<version>.tar.gz file, by running the command:
#> tar xvfz dahdi-linux-<version>.tar.gz
2. Run:
#> cd dahdi-linux-<version>
and then once in the directory run
#> ./configure; make
3. The compiling is done, if there is any errors please contact techdesk@sangoma.com
ZAPTEL METHOD
First find the version of Zaptel by running the command:
#>ztcfg -vvv
Zaptel Version: 1.4.12.1
Echo Canceller:
Configuration
======================
Go to http://downloads.asterisk.org/pub/telephony/zaptel/releases/ and search for your version of Zaptel there. The file name should be in the format "zaptel-<version>.tar.gz". Once you find the version then run the command
#> cd /usr/src/
and then run "wget <<URL of Zaptel>>", so for this version it would be the following command.
#> wget http://downloads.asterisk.org/pub/telephony/zaptel/releases/zaptel-1.4.12.1.tar.gz
You would need to compile the zaptel source in order to install the wanpipe driver:
1. Extract the zaptel-<version>.tar.gz file, by running the command:
#> tar xvfz zaptel-<version>.tar.gz
2. Run:
#> cd zaptel-<version>
and then once in the directory run
#> ./configure; make
3. The compiling is done, if there is any errors please contact techdesk@sangoma.com
Install OSLEC
In order to install OSLEC, you must do the following:
1) Run the following commands to shutdown Asterisk, Dahdi/Zaptel, and Wanrouter:
#> asterisk -rx "stop when convenient"
#> wanrouter stop all
#> service dahdi stop
or for zaptel
#> /etc/init.d/zaptel stop
NOTE: if you do have hardware echo cancellation on your sangoma hardware and wish to use OSLEC instead, you must disable echo cancellation. To do go into "/etc/wanpipe/wanpipeX.conf" (Where X stands for the wanpipe number) and set TDMV_HWEC, TDMV_HW_FAX_DETECT and TDMV_HW_DTMF to NO.
2) Create a script with the commands below or run the commands individually:
For DAHDI:
#> cd /usr/src
#> cp -fr /usr/src/dahdi-linux-<ver> /usr/src/dahdi
#> wget http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.28.tar.bz2
#> tar xjf linux-2.6.28.tar.bz2
#> 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
Go into /etc/dahdi/system.conf (they may appear more then once for the number of devices installed on the system):
Change "echocanceller=mg2,1" to "echocanceller=OSLEC,1"
FOR ZAPTEL
#> cd /usr/src
#> svn co http://svn.astfin.org/software/oslec/trunk/ oslec
#> cd oslec
#> make
#> cp kernel/oslec.ko /lib/modules/`uname -r`/misc/.
#> insmod kernel/oslec.ko
#> cd ../zaptel
#> cp /usr/src/oslec/kernel/Module.symvers .
#> ./configure
#> patch -p1 < ../oslec/kernel/zaptel-1.4.11.patch
#> make
#> make install
#> grep /lib/modules/`uname -r`/misc/zaptel.ko: /lib/modules/`uname -r`/modules.dep
Go into /etc/asterisk/zapata.conf :
Change:
echocancel=yes
echocancelwhenbridged=no
;echotraining=400
To:
echocancel=256
echocancelwhenbridged=no
;echotraining=400
4) Reboot your machine
Verify OSLEC is present by running the following:
#> wanrouter start
Dahdi Method:
#> dahdi_cfg -vvv
DAHDI Tools Version - 2.2.0
DAHDI Version: 2.2.0
Echo Canceller(s): OSLEC
Configuration
======================
Zaptel Method:
#>ztcfg -vvv
Zaptel Version: 1.4.12.1
Echo Canceller: OSLEC
Configuration
======================
