Agenda - 11-17-2011 - 1 - Attachment 1

Browse Search

Orange County Emergency Management, North Carolina Final VIPER Anal sis Re ort Au ust 20, 2004 2.0 TECHNICAL DESCRIPTION OF VIPER NETWORK The VIPER design is based on an 800 MHz dual-Mode SmartZone system from Motorola. The State has chosen to pursue an 800 MHz digital, trunked, SmartZone OmniLink simulcast/multicast system design to accomplish the goals of building out a statewide, voice, trunked radio network. This technology provides the ability to leverage the existing resources throughout the State, which include several legacy Motorola systems and State-licensed 800 MHz frequencies. VIPER implementation began with the purchase of SmartZone Zone Master and site equipment for the Special Olympics in December 1999. North Carolina State Highway Patrol has added equipment and sites to the core system to the current level of 800 MHz sites shown on the map in FIGURE 2-1. This figure was provided in the Appendix E of the CJIN General Assembly Report April 2004. SmartZone is a type of wide-area coverage design capable of incorporating current single-site and multi-site systems designs into a single system. It is capable of supporting analog systems, digital systems and mixed-mode systems, as well as legacy 800 MHz, UHF and VHF systems. SmartZone OmniLink systems are deployed to meet the requirements for achieving wide-area coverage. Existing SmartNet II subscriber equipment will work on the SmartZone OmniLink platform, minimizing the initial expense of replacing mobile and portable radios. CJIN documentation stated VIPER key design goals and assumptions as follows: • 95% portable on-street coverage. • Microwave backbone network is being upgraded to digital to support VIPER site connectivity throughout the state. • In-building coverage is the responsibility of local governments • APCO Project 25 Common Air Interface (CAI) compliant • Transition to full Project 25 level after sufficient time has been given to existing users for transition to future Project 25 compliant radio purchases • Existing APCO Project 16 compliant subscriber units can operate on the new system until agencies are ready to purchase new user equipment. • Agencies without an existing 800 MHz system must purchase APCO Project 25 subscriber units to operate on VIPER. • Interoperability with existing VHF/UHF systems will be considered in the overall system plan for VIPER Section 2 -Technical Description of VlY1;K 1VetworK ~g..~ ®~ Page 4 of 43 ,,, ._.