Assignment 2: H323 (by Fabio & Anneke)

We use gnomemeeting softphones and a gnugk gatekeeper.

Configuration of Gnomemeeting

Edit -> Preferences

• General: You can fill in your personal data and leave everything default
• H323 Settings: Gatekeeper:

Registering method: Gatekeeper host
Gatekeeper host: 129.125.71.173:1719 
Gatekeeper alias: 601

Gatekeeper host is the IP address and port of the gatekeeper. Port 1720 is the standard h323 port but in our case the h323 client was on the same computer so the 1720 port was already occupied.

Gatekeeper alias is the primary alias with the gatekeeper, also the extension number in Asterisk to keep things simple.

Tick the "Register this alias as the primary alias with the gatekeeper" box and Apply (sorry, this is of course after you've installed the gk) :).

• H323 Settings: Gateway - Do not use a gateway
• Codecs: Audio Codecs - We enabled all available codecs.
• Codecs: Video Codecs - We have not been able to spend time on this
• Devices:
  • Audio Devices:
    • Audio Plugin ALSA
    • Output device: Intel ICH5
    • Input device: Intel ICH5
  • Detect Devices

(All the audio and video devices settings are of course depending on your local system, this is more for our own reference) :)

GnuGk Gatekeeper

Packages for this gatekeeper are not available for CentOS. We found out that this gatekeeper was already installed in Etch. (System administration provided us with two machines with etch so we could get the sound working).

Almost no configuring here. Just enable PROXY.

We are still playing with the gatekeeper so this section is under construction.

Configuration of Trixbox 1.2.3

We followed mostly the instructions from these two forums on the Trixbox site:

• here is the working configuration & tips for oh323
• H323, SIP and Gatekeeper

There are more forums where people say things about h323 but these seem to be the most helpful.

Following the suggestions we used Trixbox 1.2.3 with asterisk-addons-1.2.3. In order to do this we deleted the current addons:

rpm -qa | grep asterisk-addons
rpm -e asterisk-addons-1.2.4_1.2.12.1-1.294

And loaded the older addons: (these can be found ...............)

rpm -i asterisk-addons-1.2.3-1.219.i386.rpm

If this is really necessary we can't tell right now. We got things working when changing other things as well so later on we can try if it still works without this step.

Next thing was to edit the ooh323.conf file. This file needs to be copied from the samples first:

cp /etc/asterisk-1.2.8-samples/ooh323.conf /etc/asterisk 

Here is our ooh323.conf:

amportal stop amportal start

then it works perfect.