Life cycle costs of communication towers include initial construction, ongoing maintenance, power consumption, and eventual replacement. These infrastructure elements form the backbone of public safety networks, but they represent only one component of total communication cost. The purpose of this report is to present an estimate of the remaining costs required to complete the nationwide transition from legacy 911 systems to secure, interoperable, IP and standards-based NG911 systems, as defined later in this report. The report finds that finds that the estimated cost of. For construction, procurement, production, and modification of Other Procurement, Army, equipment, including ordnance, spare parts, and accessories therefore; specialized equipment and training devices; expansion of public and private plants, including the land necessary therefore, for the. For decades, the cost of communicating for the Army has been almost entirely measured in dollars. How much money would the service require to purchase, operate, and maintain its information systems? How much bandwidth could a unit afford to connect its headquarters? Technological advances and the. Communication cost in emergency services extends across multiple dimensions that interact in complex ways. Indirect costs encompass training time, system downtime, quality assurance processes. THE ACCESS LAYER IS RESPONSIBLE FOR CONNECTING USERS TO THEIR IMMEDIATE SERVICE PROVIDERS. FIRST, THE COMMUNICATIONS START BY ENABLING USERS TO COMMUNICATE WITH THE COMMUNICATION SYSTEM TO ALLOW THE START OF INFORMATION EXCHANGE/TRANSMISSION.