IPAM for iTop is the module / extension version of TeemIp that can be integrated on an existing iTop instance. It only provides the core IP management features embbeded in TeemIp standalone. Other features are available for iTop through extensions.
In any case, check the obsolescence status of your version here below.
This IPAM for iTop extension is available through iTop Hub and can be automatically downloaded and deployed from there. Note that iTop Hub may not be up to date with the latest TeemIp version.
Comprehensive documentation can be found on this wiki, namely in the chapters:
The IPAM for iTop extension is licensed under the terms of the GNU Affero General Public License Version 3 as published by the Free Software Foundation. This gives you legal permission to copy, distribute and/or modify TeemIp under certain conditions. Read the ’license.txt’ file in the TeemIp distribution. TeemIp is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE WARRANTY OF DESIGN, MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
Here is the obsolescence status of the different iTop releases. To make a long story short, only the current and previous branch are supported. And fixes are brought into the current branch only.
You may refer to iTop's Community Releases on iTop's Hub to find out the support status of a given iTop version.