Get conferences working in FreePBX 2.8


I am using FreePBX with Asterisk I am trying to get a conference number up and running. But when I have added a conference to FreePBX and I dial the conference number it hangs up immediatly.

I looked at the logfile and saw the following WARNING:
[2011-01-10 17:30:13] WARNING[13784] chan_sip.c: Retransmission timeout reached on transmission [email protected] for seqno 2 (Critical Response) – See doc/sip-retransmit.txt.
Packet timed out after 33600ms with no response

I did some looking on the internet and found that the module is missing in the /usr/lib/asterisk/modules/.

Can somebody help to get this module installed? Don’t know how to start this.


Thanks to the post of tadpole in this thread: I came up with the following solution that makes my conference work:

As root on your Asterisk server:

cd /usr/src/
tar zxvf dahdi-linux-complete-2.4.0+2.4.0.tar.gz
cd dahdi-linux-complete-2.4.0+2.4.0
make all
make install
make config
/etc/init.d/dahdi restart
chkconfig dahdi on
cd /usr/src/
wget wget
tar zxvf asterisk-1.8-current.tar.gz
cd asterisk-1.8.x.x (Replace X.X with the current version number)
amportal stop
make clean
contrib/scripts/ (this may take a while)
make menuselect
Head into Channel Drivers and make sure chan_dahdi is selected
Head into Add-Ons and make sure app_mysql, app_saycountpl, cdr_mysql, format_mp3, res_config_mysql are selected
Head into Extra Sound Packages and make sure EXTRAS-SOUNDS-EN-GSM is selected
make install
amportal start