Contents
1. Getting Started ........................................................................ 17
2. Introduction ............................................................................ 19
About This Manual ............................................................................... 19
What It Covers ............................................................................ 19
Who Should Read It ...................................................................... 19
Contact Us ................................................................................. 19
What’s in the Box ............................................................................... 20
3. About the Radio ....................................................................... 21
The 4RF Aprisa SR+ Radio ...................................................................... 21
Product Features ................................................................................ 22
Functions .................................................................................. 22
Security .................................................................................... 24
Performance .............................................................................. 25
Usability ................................................................................... 25
Product Overview ............................................................................... 26
Network Coverage and Capacity ....................................................... 26
Automatic Registration .................................................................. 26
Remote Messaging ........................................................................ 26
Store and Forward Repeater ............................................................ 27
Repeater Packet Forwarding..................................................... 27
Repeater Messaging ............................................................... 30
Peer To Peer Communication Between Remote Radios ...................... 31
Architecture ...................................................................................... 33
Product Operation ........................................................................ 33
Physical Layer ............................................................................. 33
Data Link Layer / MAC layer ............................................................ 34
Channel Access .................................................................... 34
Hop by Hop Transmission ......................................................... 35
Adaptive Coding and Modulation ................................................ 35
System Gain vs FEC Coding ............................................................. 36
Network Layer ............................................................................ 37
Packet Routing ..................................................................... 37
Static IP Router .................................................................... 38
Bridge Mode with VLAN Aware .................................................. 53
VLAN Bridge Mode Description .................................................. 54
Terminal Server Operational in Bridge and Router Modes ................... 56
Avoiding Narrow Band Radio Traffic Overloading .................................... 60
Interfaces ......................................................................................... 62
Antenna Interface ........................................................................ 62
Ethernet Interface ....................................................................... 62
RS-232 / RS-485 Interface ............................................................... 62
USB Interfaces ............................................................................ 62
Protect Interface ......................................................................... 62
Alarms Interface .......................................................................... 62
Front Panel Connections ....................................................................... 63
LED Display Panel ............................................................................... 64
Normal Operation ........................................................................ 64
Single Radio Software Upgrade ......................................................... 65