It mainly presents two typical solutions to the realization of local number portability based on intelligent network(IN) and phone name system(PNS):carrier portability code(CPC) is the solution to service provider portability.

With the further development of economic internationalization and the economic integration of world, the oil field Communication Company of Tarim Basin faces both international and domestic competitions, making the condition of survival and development more severe.

Telecommications enterprise of our country has shaped up the layout of competition among large telecommunication operators through the reform and reorganization for several years, Dalian Communication Company put out the PHS service with the intenion of raise the revenue at the circumstances of lost the competition superiority.

Research and Realization of PSTN Number Portability Based on IN Architecture;

Economic Feasibility and Implementation Proposals on Providing Mobile Number Portability Service in China;

Based on the microcosmic economics,the theory of industrial organization and game theory the paper explores the competitive strategy of mobile operators under two different policy environment, one is without number portability and the other is with number portability.

A Discussion on Employee s Training System of Communication Engineering Company in Henan Province;