MOSCOW--(BUSINESS WIRE)--SPIRIT DSP, the world's #1 voice and video over IP engines provider serving more than 1 billion users in 100+ countries, announced today four years of mutually beneficial partnership with FRITT (First Research Institute of Telecommunications), a part of Datang Telecom Group - a Chinese multinational telecommunications equipment company with 8 billion dollar assets and 30 thousands employees. For 4 years SPIRIT supported multiple new mobile platforms and web browsers. Se