Here's a short summary on how to install it on a clean, brand new Debian Lenny installation. Details are correct at time of writing ;-)
First import the AG-Projects key into apt so we know the packages can be trusted.
wget http://download.ag-projects.com/agp-debian-gpg.key apt-key add agp-debian-gpg.key
Then open the file /etc/apt/sources.list and change al mention of "lenny" into "sid". Also add the following to the end of the file:
# AG Projects software deb http://ag-projects.com/debian unstable main deb-src http://ag-projects.com/debian unstable main
Then it's time to upgrade to sid
apt-get update apt-get dist-upgrade
And finally it's time to install SIP Simple ```bash apt-get update apt-get install python-sipsimple sipsimple-cli