Ombutel is a free PBX software that provides a fully operational phone system for any use. There are no limitations on amount of users and features the core Ombutel systems (there may be add ons to introduce additional functionality).
Among the many features of Ombutel one may find all basic call features such as:
also many more advanced features are available, among which are:
Being based on Asterisk, Ombutel may be considered a great (and friendlier) alternative to FreePBX, Elastix and other Asterisk based systems.