Founded in 2003, TelTel has successfully built a robust worldwide network to enable consumer electronics devices and value-added services to be fully interconnected, universally accessible, and interoperable on this network. TelTel was one of a to adopt SIP as the choice standard to follow when SIP was still in its infancy because the company believe in two values: 1. Open standard; 2. Managed peer-to-peer (P2P) network. Based on these two values, TelTel named its network TelTel Network - Public SIP Transport Network, a deliberate emulation of PSTN (Public Switched Telephone Network), to signify its availability to the general public through an open protocol and its ability to support any device, services, and users with end-to-end network solutions.