Specifications include, but are not limited to: The purpose of this Request for Proposals (RFP) by the County of Frederick, Virginia (County) is to solicit sealed proposals from qualified vendors (Offerors) for the provision of an Association of Public-Safety Communications Officials (APCO) International Project 25 (P25) radio communications system to support mission-critical public safety communications within the county. The proposed communications system shall provide enhanced, two-way wireless communications capabilities to all public safety users. Proposals are requested for the following: 1. A new P25 trunked simulcast Phase II system to replace the County’s multiple radio systems, including ultra-high frequency (UHF) conventional and trunked system elements, a very-high frequency (VHF) conventional analog system, and various interoperability channels. 2. A new Internet Protocol (IP)-based microwave. 3. New radio dispatch consoles at the County’s Department of Public Safety Communications (911 center) or an upgrade to current consoles. 4. Mobile and portable subscriber radios for the County’s first responders. 5. Simulcast tone-and-voice paging. 6. Civil work to support upgrades to new and existing radio sites, and tower upgrades to support the aforementioned communications subsystems. In addition to the above, Offerors should address in their proposals system installation and commissioning, and ongoing maintenance support, to ensure a state-of-the-art system. The proposed system will be owned by Frederick County. The system procurement process is being administered by Frederick County. For brevity, the generic term “County” used throughout the Request for Proposal (RFP) refers to Frederick County, unless otherwise specified.