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Technical Specifications St. Mary’s County, Maryland REQUEST FOR PROPOSALS 800 MHz COUNTYWIDE DIGITAL RADIO SYSTEM EXHIBIT A-TECHNICAL SPECIFICATIONS 1.0 INTRODUCTION ............................................................................................................ 15 1.1 DEFINITIONS ............................................................................................................................. 15 2.0 BACKGROUND AND GENERAL DESCRIPTION OF WORK ........................ 19 2.1 SCOPE OF WORK ...................................................................................................................... 19 2.2 CURRENT SYSTEM DESCRIPTION ........................................................................................ 19 2.3 SYSTEM FUNCTIONAL OBJECTIVES .................................................................................... 19 2.4 MAJOR SYSTEM COMPONENTS ............................................................................................ 21 2.5 SERVICES PROVIDED BY THE COUNTY .............................................................................. 22 2.6 STANDARDS OF WORK ............................................................................................................ 23 3.0 SYSTEM INFORMATION ........................................................................................... 25 3.1 SYSTEM IN-BUILDING COVERAGE ...................................................................................... 25 3.2 APCO PROJECT 25 CONFORMANCE ..................................................................................... 27 3.3 INTEROPERABILITY ................................................................................................................ 28 3.4 NETWORK BACKBONE ............................................................................................................ 29 3.5 NETWORK COMMUNICATIONS CONTROL ........................................................................ 29 3.6 CORE AND OPTIONAL TECHNICAL/OPERATIONAL NETWORK FEATURES .............. 29 3.6.1 Talkgroup Call ..............................................................................................................................30 3.6.2 Talkaround (Direct Mode) ............................................................................................................30 3.6.3 Push-To-Talk Unit Identification (PTT-ID)/Display ....................................................................31 3.6.4 Emergency Alert/Call ...................................................................................................................32 3.6.5 Selective Alert ...............................................................................................................................33 3.6.6 Individual Call ..............................................................................................................................33 3.6.7 Selective Radio Disable/Inhibit .....................................................................................................34 3.6.8 Dynamic Regrouping ....................................................................................................................34 3.6.9 Talkgroup Patch/Merge .................................................................................................................34 3.6.10 Multi-Select (Simul-Select) ..........................................................................................................35 3.6.11 Priority Level Access ....................................................................................................................35 3.6.12 Busy Processing/Queuing .............................................................................................................36 3.6.13 Site Registration/Affiliation ..........................................................................................................36 St. Mary’s County, MD Page 2 of 278 800 MHz LMR System RFP-Exhibit A St. Mary’s County, Maryland REQUEST FOR PROPOSALS 800 MHz COUNTYWIDE DIGITAL RADIO SYSTEM EXHIBIT A-TECHNICAL SPECIFICATIONS 3.6.14 Talkgroup Steering ........................................................................................................................37 3.6.15 Broadcast/Announcement Talkgroup Call ....................................................................................37 3.6.16 Sub-Network (Subsystem) Call .....................................................................................................37 3.6.17 Late Entry .....................................................................................................................................38 3.6.18 Transmission/Message Trunking ..................................................................................................38 3.6.19 Audio Interruption ........................................................................................................................38 3.6.20 Scan/Priority Monitoring ..............................................................................................................38 3.6.21 Out-of-Range Indications ..............................................................................................................39 3.6.22 Console Priority ............................................................................................................................39 3.6.23 ID Scheme .....................................................................................................................................39 3.6.24 Area (Site) Selection .....................................................................................................................40 3.6.25 Site Preferences.............................................................................................................................40 3.6.26 Channel Beacon ............................................................................................................................40 3.6.27 Alert Tones ...................................................................................................................................41 3.6.28 Ready-to-Talk Tone ......................................................................................................................41 3.6.29 Talkgroup Misdirection .................................................................................................................41 3.6.30 Critical/Mandatory Site(s) .............................................................................................................42 3.6.31 Call-Delay Defeat .........................................................................................................................42 3.6.32 Dynamic (Tactical) Priority ..........................................................................................................42 3.6.33 Repeat Disable ..............................................................................................................................43 3.6.34 Multiple Key Encryption (OPTION) ............................................................................................43 3.6.35 Status & Message (OPTION) .......................................................................................................44 3.6.36 Discreet Terminal Monitoring (OPTION) ....................................................................................44 3.6.37 Short Message/Alphanumeric Text Service (OPTION) ................................................................44 3.6.38 Subscriber Tracking/GPS Location Services (OPTION) ..............................................................45 3.6.39 Telephone Interconnect (OPTION) ...............................................................................................45 4.0 RF SPECTRUM CONSIDERATIONS ...................................................................... 47 4.1 RF DESIGN REQUIREMENTS .................................................................................................. 47 4.1.1 700 MHz & 800 MHz Operational Modes ....................................................................................47 4.1.2 APCO Project 25 Conformance ....................................................................................................48 4.1.3 RF Engineering Data .....................................................................................................................49 4.1.4 RF Sites .........................................................................................................................................50 4.1.5 FCC Licensing ..............................................................................................................................51 4.1.6 Interference Mitigation/800 MHz Reconfiguration Compliance ..................................................52 5.0 RADIO SYSTEM INFRASTRUCTURE REQUIREMENTS .............................. 53 5.1 SYSTEM ATTRIBUTES ............................................................................................................. 53 5.1.1 Grade of Service ...........................................................................................................................54 5.1.2 Channel Access Time ....................................................................................................................55 5.1.3 Trunking Operation .......................................................................................................................56 5.1.3.1 Operations within
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