Hello, About introducing myself: I am a network engineer working in the fields of VoIP and Radio Communications services at NEWITEC CONSULTING Tunisia ( www.newtechtn.com). Some of my projects done are: 1- Integration of custom SCTP and M3UA layers into the Dialogic SS7 stack for a french client. 2- Integration of a solution for SIP traversal over firewalls and nats. 3- Collaboration in the development of a GSM IP client (does authentification to a GSM network with the classic method but over IP). This work is a part of a roaming hub solution. 4- VoIP switching, billing and security. If you find my work interesting, please involve me in the development of the project. Thank you.