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1. SYSTEM DESCRIPTION/PERFORMANCE <br />This section provides information on the system description and system performance <br />of the City of Santa Ana Police Department Wireless Data System, Below is a brief <br />description of the proposed upgrade, system components and the RD-LAP radio <br />transmission standard. <br />1.1 SYSTEM DESCRIPTION <br />9. 1. 1 Current System <br />The current mobile data system entails a CAD/RMS software suite, an NCP500 <br />connected through UDT201 B/T modems to the existing Base Station located at 20 <br />Civic Center Plaza. Through this, the dispatch center can send data to the KDT480 <br />mobile data terminals in the field. The system currently uses MDC4800 over the air <br />protocol. <br />1.1.2 Proposed Upgrade <br />Motorola proposes replacing the NCP 500 with an RNC 3000. This will include a <br />desktop console configuration along with a V.3229 dial up modem at the RNC 3000 to <br />allow remote access to the controller, The V.3229 modem has password verification <br />capabilities for additional security. Dial back capability is not a feature of the modem, <br />and Motorola does not recommend this as a security function. The RNC 3000 will <br />communicate with the Base Station through two V.3229 modems connected by a <br />leased telephone line. A large number of KDT 480 mobile data terminals will be <br />replaced with VRM600, vehicular radio modems configured with the current <br />MDC4800 over the air protocol. Replacement of the NCP 500 with the RNC 3000 <br />allows the system to be expanded beyond its current limitation of 150 registered <br />mobile data terminals, and sets the stage for migration to RD-LAP 9.6 in the future. <br />This migration will increase the baud rate from 4.8 Kbps to 9.6 Kbps. <br />Motorola recommends that any upgrade in the CAD/RMS system take into <br />consideration that the RNC 3000 utilizes TCP/IP over ethernet protocol. <br />The overall system design, and the components that will be supplied by Motorola, is <br />shown in the system block diagram at the back of this section. <br />1.1.2.1 Detailed Component Description <br />Radio Network Controller <br />F�iiINK1I1I11 <br />�1NOTQRpd ,4 Confidential and Proprietary <br />