This tender invites bids for a three-year service contract involving the repair and maintenance of Alcatel EPABX systems installed at various Pakistan Airports Authority locations including Karachi, Hyderabad, Peshawar, Multan, and Quetta. The contract covers multiple models such as Omni PCX Enterprise and Omni PCX Office with specified quantities at each location. Bidders must be registered with FBR on ATL and hold a valid GST certificate. The procurement will be conducted through a single stage two envelope method with electronic submission via the PPRA EPADS Web Portal. Additionally, a hard copy of the bid along with bid security must be submitted in a sealed envelope to the Additional Director Networks at HQPAA Karachi before the closing date.