1- Add this GPG key to verify the repository:
# Add the key to your key list
gpg --keyserver keyserver.ubuntu.com --recv-keys 3596ED6E
# Add the key to apt utils
gpg --export --armor 3596ED6E | sudo apt-key add -

2- Add the directory:
A- For Unstable:
# The Ekiga SVN snapshot repository
deb http://snapshots.ekiga.net/snapshots/debian/ ./

4- Update the package database:
aptitude update
4- Install Ekiga:
aptitude install ekiga-snapshot


(optionnaly you can add more option installing those packages:
libpt-snapshot-plugins-v4l #for webcam support using only V4L API
libpt-snapshot-plugins-avc #FireWire camera AVC video support
libpt-snapshot-plugins-dc #FireWire camera DC video support
libopal-snapshot-plugins-h264 #The H264 Video codec)

1- Add this GPG key to verify the repository:
# Add the key to your key list
gpg --keyserver keyserver.ubuntu.com --recv-keys 3596ED6E
# Add the key to apt utils
gpg --export --armor 3596ED6E | sudo apt-key add -

2- Add the repositories:
A- For Hardy:
# The Ekiga SVN snapshot repository
deb http://snapshots.ekiga.net/snapshots/ubuntu/ hardy main
# The hardy-updates repository (official)
deb http://archive.ubuntu.com/ubuntu/ hardy-updates main multiverse
B- For Gutsy:
# The Ekiga SVN snapshot repository
deb http://snapshots.ekiga.net/snapshots/ubuntu/ gutsy main
# The gutsy-updates repository (official)
deb http://archive.ubuntu.com/ubuntu/ gutsy-updates main multiverse

C- For Intrepid:
# The Ekiga SVN snapshot repository
deb http://snapshots.ekiga.net/snapshots/ubuntu/ intrepid main


3- Install Ekiga:
sudo aptitude install ekiga-snapshot

(optionnaly you can add more option installing those packages:
libpt-snapshot-plugins-v4l #for webcam support using only V4L API
libpt-snapshot-plugins-avc #FireWire camera AVC video support
libpt-snapshot-plugins-dc #FireWire camera DC video support
libopal-snapshot-plugins-h264 #The H264 Video codec)

The sources are updated from SVN and packed every night. The latest available packs can be downloaded using the following URLs, for example in automatic scripts:

• http://snapshots.ekiga.net/snapshots/sources/archives/ptlib-snapshot-latest.tar.gz
• http://snapshots.ekiga.net/snapshots/sources/archives/opal-snapshot-latest.tar.gz
• http://snapshots.ekiga.net/snapshots/sources/archives/ekiga-snapshot-latest.tar.gz

To compile the SVN snapshots, please check the generic instructions here on the Ekiga wiki!