The TIA-TSB-5053 Bulletin on Mounting System Classification is a comprehensive document. This PAN delves into the different uses for this Bulletin and the benefits it provides to all stakeholders in the telecommunications industry. TIA-TSB-5053 was initiated by a team of people assembled in February of 2014 at a meeting in Champaign, Illinois at the request of some of the industry’s carriers, which included four of the major mount manufacturers: CommScope, Rohn, Sabre and Valmont.