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 Users registered at a different site than the originating unit's site will only hear a multi-site talk group call if the talk group has registered users logged into the site. Conventional Channel Support PSAP dispatch consoles will have access to conventional radio channels in both a privately owned system and VIPER. Each PSAP connected to VIPER will have a new CEB to interface with conventional channels locally at the PSAP. Conventional channel access will be required to handle migration and for any entity not migrating to VIPER and to operate interoperability channels such as the UHF medical channels being upgraded by the state. Network Management Support A privately owned and managed trunked radio system would require more support to manage than the VIPER system. NC-SHP will perform all network management in VIPER. Orange County entities must request configuration changes and addition of subscriber radios onto VIPER from NC-SHP before changes and additions will be implemented. 7.2 Infrastructure Comparison Confi uration The private system design is a five site, eleven channel dual-mode simulcast system to cover Orange County. VIPER is initially being placed in service as a dual-mode multi-site trunked radio system with three sites in Orange County. The baseline VIPER design usually allocates five channels per site. Multi-site differs from simulcast in that different sets of radio frequencies operate at each site. Calls on the VIPER radio network are switched and rebroadcast to other sites dependant upon whether user radios are registered at a site monitoring the talk group. The quantity of channels allocated to each site is based on the number of anticipated radio users registered at a site at one time. Section 7 -Comparison of Private System and VIPER . ~ Page 31 of 43 ~x ..,.