Dear Users and Developers, A tutorial on the OSP peering module is now available at http://openser.org/docs/osp/Multi-Lateral_Peering_with_OpenSER_1_0_0.pdf. The module enables secure, multi-lateral peering with SIP devices that support OSP (i.e. OpenSER 1.1.x, OpenSER 1.0.x, (Open)SER 0.9.x, Asterisk 1.2). Open source OSP servers are available at www.sipfoundry.org/OSP. Regards, Dmitry