vii
3.2.7.1 Digital Voting in Digital Conventional Single Site/Local Channels. 244
3.2.7.2 Digital Voting in IP Site Connect (Wide Area Channels) ............... 245
3.2.7.3 Digital Voting in Capacity Plus....................................................... 246
3.2.7.4 Digital Voting in Linked Capacity Plus ........................................... 247
Section 4 System Design Considerations
4.1 Purpose ............................................................................................................ 249
4.2 Analog to Digital Migration Plans ..................................................................... 249
4.2.1 Pre-Deployment System Integration ....................................................... 249
4.2.2 Analog to Digital Preparation and Migration............................................ 250
4.2.3 New/Full System Replacement ............................................................... 251
4.3 Frequency Licensing ........................................................................................ 252
4.3.1 Acquiring New Frequencies (Region Specific)........................................ 252
4.3.2 Converting Existing 12.5/25 kHz Licenses.............................................. 253
4.3.3 Repeater Continuous Wave Identification (CWID).................................. 253
4.4 Digital Repeater Loading.................................................................................. 254
4.4.1 Assumptions and Precautions................................................................. 254
4.4.2 Voice and Data Traffic Profile ................................................................. 255
4.4.3 Estimating Loading (Single Repeater and IP Site Connect) ................... 256
4.4.4 Estimating Loading (For Capacity Plus).................................................. 257
4.4.5 Estimating Loading (For Linked Capacity Plus) ...................................... 260
4.4.6 Loading Optimization (For Single Repeater and IP Site Connect).......... 261
4.4.6.1 Distribution of High Usage Users................................................... 261
4.4.6.2 Minimize Location Periodic Update Rate....................................... 262
4.4.6.3 Data Application Retry Attempts and Intervals .............................. 265
4.4.6.4 Optimize Data Application Outbound Message Rate .................... 265
4.4.6.5 GPS Revert and Loading............................................................... 266
4.4.6.6 Enhanced GPS Revert – Loading & Reliability.............................. 269
4.4.7 Loading Optimization (For Capacity Plus and Linked Capacity Plus) ..... 271
4.4.7.1 Preference for Using a Frequency................................................. 271
4.4.7.2 Improving Channel Capacity by Adjusting Hang Times................. 271
4.4.7.3 Call Priority .................................................................................... 272
4.4.7.4 Call Initiation .................................................................................. 272
4.5 Multiple Digital Repeaters in Standalone Mode ............................................... 273
4.5.1 Overlapping Coverage Area.................................................................... 273
4.5.2 Color Codes in a Digital System ............................................................. 274
4.5.3 Additional Considerations for Color Codes ............................................. 275
4.6 Multiple Digital Repeaters in IP Site Connect Mode......................................... 276
4.6.1 System Capacity ..................................................................................... 276
4.6.2 Frequencies and Color Code Considerations ......................................... 276
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