This tender invites sealed bids for operational support services of critical telecommunication systems at Headquarters Special Communications Organization in Rawalpindi. The scope includes maintenance and support for OTN Systems (both domestic and international transmission), GPON Systems, and IP Multimedia Systems that handle national and international voice traffic connectivity. These systems are vital for uninterrupted communication and require expert handling by original manufacturers or authorized distributors. The work involves ensuring optimal performance of advanced optical transport networks and broadband access systems. Located at Qasim Road, Rawalpindi, the site demands technical expertise to manage complex network equipment and maintain high availability. Bidders must be registered with Income Tax and Sales Tax Departments and provide a National Bank of Pakistan draft of PKR 2000 as a non-refundable fee for bidding documents. Participants should ensure compliance with all regulatory requirements including valid PEC registration and FBR ATL status for the financial year 2025-26. This tender emphasizes the importance of submitting a complete technical proposal along with sealed brochures or samples. The evaluation process includes opening the technical bids first, followed by financial bids only for technically qualified bidders. The submission deadline is set for 13th February 2026 at 10:00 AM, with technical bids opening at 10:30 AM on the same day. Bids must be delivered to the Ordnance Branch at the SCO Headquarters, Qasim Road, Rawalpindi. Late submissions will not be entertained. Pro-Tip: Make sure to carefully review the tender documents for Earnest Money and Call Deposit Receipt (CDR) requirements, as missing these often leads to disqualification. Also, attend the bid opening to clarify any queries and observe the process firsthand.