See COPYING.* for the full licenses. The libosmo-e1d library is licensed under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. The osmo-e1d daemon is licensed under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.