Telecommunication system (Central) are greatly important because of their communicational roles in organizations. Furthermore, the vendor selection of a telecommunication system is a group based , multi-criteria decision problem. The group decision-making process can be improved by a systematic and logical approach to assess priorities based on the inputs of several people from different functional areas within the company. The analytic hierarchy process (AHP) can effectively involve several decision-makers with different conflicting objectives to arrive at a consensus decision. In this paper, an AHP-based model is formulated and applied to a real case study to examine its feasibility in selecting a vendor for a telecommunications system. The use of the proposed model in Qazvin Islamic Azad University indicates that it can be applied to improve the group decision making in selecting a vendor that satisfies customer specifications and using the proposed AHP model can reduce the time taken to select a vendor.