Motorola MOTOTRBO SYSTEM PLANNER Specifications Page 176
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System Design Considerations 167
November, 2008
4.6.3.2.4.2Required Bandwidth Calculations While Utilizing a Secure Virtual
Private Network
As was discussed in previous chapters, peer-to-peer communications over the network are
optionally authenticated and are also encrypted end-to-end if enabled in the radios. See “Voice
and Data Privacy” on page 62. If this is not considered sufficient for a particular customer, IP Site
Connect supports the ability to work through a Secure Virtual Private Network (VPN). Secure VPN
is not a function of the IP Site Connect device but rather of the router. It is important to note that
Secure VPN does add the need for additional bandwidth and may introduce additional delay.
For a quick reference, the graphs below show the required bandwidth for the two previously
discussed simple IP Site Connect system configurations, but in this case utilizing routers with
Secure VPN enabled and repeater Authentication Disabled. When utilizing Secure VPN routers,
repeater authentication is not necessary since the Secure VPN utilizes its own authentication. As
can be seen, the bandwidth requirements per device increase substantially. This should be taken
into account when planning for bandwidth.
The following parameters should be used in the previous equation to calculate the bandwidth
requirements of each device in the system when secure VPN in the routers is enabled and
repeater authentication is disabled.
BWVC = 23 kbps = Bandwidth required to support Wide Area Voice or Data with Secure VPN
BWLM = 5 kbps = Bandwidth required to support Link Management without authentication
BWIR = 4 kbps = Bandwidth required to support Master Messaging
BWRD = 64 kbps = Bandwidth required to support RDAC commands
NOTE: The preceding data was compiled using the Linksys EtherFast Cable/DSL VPN Router
with four-port switch. Model: BEFVP41. Other routers using different algorithms may yield
different results.
600
500
400
300
200
100
0
2 4 6 8 10 1412
Bandwidth Required vs Number of Repeaters
( 2 Wide Area Channels, with RDAC, Secure VPN )
Uplink / Downlink Bandwith ( Kbps )
Number of Repeaters
700
800
Master
Non-Master
600
500
400
300
200
100
0
2 4 6 8 10 1412
Bandwidth Required vs Number of Repeaters
( 1 Wide Area Channel, with RDAC, Secure VPN )
Uplink / Downlink Bandwith ( Kbps )
Number of Repeaters
700
800
Master
Non-Master
- System PlannerSystem Planner 1
- Manual Revisions 3
- Computer Software Copyrights 3
- Documentation Copyrights 3
- Disclaimer 3
- Trademarks 3
- Section 1 Introduction 4
- SECTION 1 INTRODUCTION 10
- 1.2 Software Version 11
- 2.1.1.3 Part Three: Framing 13
- Today’s Analog 15
- MOTOTRBO 15
- Analog 2-Channel System 16
- MOTOTRBO 2-Channel System 16
- Voice Call 2 (or Data) 17
- Voice Call 1 (or Data) 17
- Improving Audio Quality 20
- Analog Digital 20
- Professional Series 22
- Operations 23
- 2.3.1.1 Group Calls 29
- 2.3.1.2 Private Calls 29
- 2.3.1.3 All Call 30
- 2.3.2.1 PTT ID and Aliasing 31
- 2.3.2.3 Remote Monitor 32
- 2.3.2.4 Radio Check 32
- 2.3.3 Digital Emergency 33
- 2.4.1 Overview 37
- 2.4.3 Location Services 41
- Disabled 43
- 2.4.3.4 GPS Revert Channel 45
- 2.4.4 Telemetry Services 46
- 2.4.4.2 Telemetry Examples 47
- 2.5 Scan 48
- 2.5.1 Priority Sampling 49
- 2.5.2 Channel Marking 50
- 2.5.3 Scan Considerations 50
- Scanning 55
- 2.6 Site Roaming 57
- 2.6.2 Active Site Searching 58
- 2.6.3.2 Scan or Roam 62
- Low Roaming RSSI Threshold 63
- High Roaming RSSI Threshold 63
- Not Roaming 63
- Good Coverage 63
- 56 System Feature Overview 65
- 2.7 Voice and Data Privacy 71
- 2.7.3 Scope of Protection 72
- 2.7.7 Key Mismatch 76
- Desk Set 82
- Remote Adapter 82
- Repeater 82
- GPIO Pins 84
- Antenna Switch 84
- 2.9.2 Usage Consideration 86
- 2.10 Analog Features 87
- Feature Name Description 88
- Fixed Pins Description 91
- CPS Programmable 91
- Description 91
- NA = Not Applicable 92
- 2.10.4.3.2Zetron Controllers 93
- 2.10.5 Comparison Chart 95
- Digital Signaling Features 96
- Analog Scan Features 96
- Digital Scan Features 96
- Mixed Mode Scan Features 96
- Feature Name DM 3601 96
- Developer 97
- Application Partner Program 98
- November, 2008 100
- 92 System Feature Overview 101
- TOPOLOGIES 102
- 3.1.2 Mobile Components 105
- Battery Type Battery Life 106
- 3.1.2.1.1 User Interface 107
- 3.1.2.2 MOTOTRBO Mobile 110
- 3.1.2.2.1 User Interface 111
- 3.1.2.2.6 Text Messaging 113
- 3.2 System Topologies 115
- “Door Open” 118
- esirpretn 121
- Radios in Direct Mode 125
- 3.2.2 Repeater Mode 127
- esirpretnE 134
- 3.2.3 IP Site Connect Mode 140
- Mu lti-Channel Device Driver 142
- ( MASTER ) 143
- Local Area 146
- Wide Area 148
- 4.1 Purpose 152
- 4.2 Migration Plans 152
- 4.3 Frequency Licensing 153
- 4.4.3 Estimating Loading 156
- 4.6.1 System Capacity 167
- IP Site Connect 168
- System 2 168
- 4.6.3.2.1 Delay/Latency 170
- 4.6.3.2.2 Jitter 171
- 4.6.3.2.3 Packet Loss 171
- Private Network 176
- Radio IP 185
- Accessory IP/PC Network 185
- Interface IP 185
- 16776415 196
- Administrative 197
- Repeater Mode or Direct Mode 198
- 4.8.6.3 All Call 199
- 4.8.6.4 Radio Disable 199
- 4.8.6.5 Remote Monitor 199
- 4.8.6.6 Radio Check 200
- 4.8.6.7 Call Alert 200
- 4.8.7.5.1 Emergency Alarm 204
- Location Request 205
- Location Request (Emg.) 205
- Considerations 209
- 4.11 Failure Preparedness 211
- 4.12 Configurable Timers 212
- Description Notes 213
- 5.1 Purpose 218
- 5.2 Applications Overview 218
- 5.3 Service Equipment 218
- Motorola Part No. Name 220
- 5.4.2 MOTOTRBO Trainings 221
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