Caroline County, Virginia Request for Proposals Project 25 Radio ...

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UHF/700 MHz P25 Radio Communications SystemRequestion for ProposalsCaroline County, Virginia2. Backhaul network3. Power systemsC. The proposed radio system shall include several modes of degraded operation orfailure modes. The system shall be capable of automatic activation of failuremodes in the event of a failure. Additionally, the system shall switchover to agraceful degradation mode. The following failures should invoke the activation ofa failure mode and not bring the system down completely:1. Loss of system controller2. Loss of multiple sites3. Loss of single site4. Loss of multiple channels5. Loss of single channelD. A detailed description shall be supplied describing the system operation whenany of the failures described above occurs.3.1.2 CoverageA. The service area is defined as the geographical boundaries of Caroline County.B. The system shall be designed to provide portable on-street coverage to 95% ofthe service area with 95% reliability and a Delivered Audio Quality (DAQ) of 3.4or better.C. The system shall also provide in-building coverage for the critical infrastructurelocations found in Appendix F.D. Any uncovered areas (i.e., the uncovered 5%) shall not include the majorhighways within the County.E. Coverage design, implementation, and testing for the system shall adhere to theTelecommunications Industry Association (TIA), Telecommunications SystemBulletin (TSB) 88C, or the latest revision at time of proposal.F. Delivered Audio Quality (DAQ) as defined in this document applies to bothinbound and outbound communications. Appendix E contains a matrix of DAQvalues and definitions.May 27, 2011 Page 27 of 134
UHF/700 MHz P25 Radio Communications SystemRequestion for ProposalsCaroline County, Virginia3.1.3 Site LocationsA. RESPONDENT shall determine the number and location of sites needed toprovide the required coverage. Appendix D contains a list of existing tower siteslocated within the County for potential use in the proposed system. In the eventthe RESPONDENT does not feel that the provided locations are sufficient toprovide the necessary coverage, alternate sites may be suggested.B. To reduce cost associated with implementing tower sites, every attempt shouldbe made to utilize existing tower sites. Existing County sites and leased towersare preferred over Greenfield sites. However, if existing site do not provideadequate coverage, Greenfield sites shall be proposed.C. RESPONDENTS shall be responsible for detailing any and all cost associatedwith the development of existing towers.3.1.4 Site Equipment3.1.4.1 System and Site Control EquipmentA. The system and site control equipment shall be capable of controlling all voiceand data channels in the proposed system. The control equipment may use adistributed or centralized architecture.B. The control equipment shall fully support APCO P25 functional requirements,including the Common Air Interface (CAI) and Inter-RF Subsystem Interface(ISSI).C. The RESPONDENT shall fully describe the manner in which the proposedsystem and site controllers function and operate.D. Routers, switches and servers shall consist of “off the shelf” components. TheSELECTED VENDOR shall provide any operating systems or configuration filesrequired for the operation of these “off the shelf” components.E. It is anticipated that the system and site control equipment shall be located at the911 Dispatch Center. The dispatch center is located at: 109 County Street,Bowling Green, VA 22427May 27, 2011 Page 28 of 134
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Caroline County, Virginia Request for Proposals Project 25 Radio ...

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