This document provides information about purchasing a Tellabs 835535-REV-D Titan-5500 Power Supply Module from Launch 3 Telecom. Launch 3 Telecom is a telecom supplier that offers this Tellabs part for sale, along with other telecom hardware, genuine replacement parts, and services like repair, installation, and asset recovery. The document describes payment options, same-day shipping, warranty support, and additional services available from Launch 3 Telecom.