User's Manual

Contents
Crescendo UHF Half-Duplex User Manual Page 4 of 78
5.6.1 Data Quality .............................................................................................................................................................. 31
5.6.2 RSSI .......................................................................................................................................................................... 31
5.6.3 Monitor RSSI ............................................................................................................................................................ 31
5.6.4 PRBS Generator ........................................................................................................................................................ 31
5.6.5 Statistics .................................................................................................................................................................... 31
6. Protocol Operation ................................................................................................................................................................ 34
6.1 Overview ............................................................................................................................................................................. 34
6.2 Data Driven Protocol.......................................................................................................................................................... 34
6.3 Point-to-point Protocol ....................................................................................................................................................... 35
6.4 Point-to-multipoint Protocol ............................................................................................................................................... 35
6.4.1 Strict and Relaxed Addressing .................................................................................................................................. 35
6.4.2 Local Mode................................................................................................................................................................ 36
6.5 Hayes Dial-up Protocol ...................................................................................................................................................... 36
6.5.1 Dialling ...................................................................................................................................................................... 36
6.5.2 Answering ................................................................................................................................................................. 37
6.5.3 Escape Sequence ....................................................................................................................................................... 37
6.5.4 Hanging Up ............................................................................................................................................................... 37
6.5.5 DTR Modes ............................................................................................................................................................... 38
6.5.6 Traceroute .................................................................................................................................................................. 38
6.6 Modbus RTU Protocol ........................................................................................................................................................ 39
6.6.1 Modbus Queries ........................................................................................................................................................ 39
6.7 Distributed Network Protocol (DNP) ................................................................................................................................. 40
6.8 Datagram Protocol ............................................................................................................................................................. 40
6.9 RF Link Status ..................................................................................................................................................................... 41
6.10 Protocol to Radio Address Mapping .............................................................................................................................. 42
6.11 Multiple Protocol Modes ................................................................................................................................................ 43
7. Applications ............................................................................................................................................................................ 44
7.1 Point-to-point Networks ...................................................................................................................................................... 44
7.1.1 Basic Point-to-point Network .................................................................................................................................... 44
7.1.2 Multiple Port Point-to-point Network ....................................................................................................................... 45
7.1.3 Multiple Destination Point-to-point Network ............................................................................................................ 46
7.1.4 Point-to-point Network with Repeater....................................................................................................................... 47
7.2 Point-to-multipoint Networks .............................................................................................................................................. 48
7.2.1 Basic Point-to-multipoint Network ........................................................................................................................... 48
7.2.2 Point-to-multipoint Network with Roaming Remote ................................................................................................ 49
7.3 Hayes Dial-up Networks ..................................................................................................................................................... 50
7.3.1 Basic Hayes Dial-up Network ................................................................................................................................... 50
7.3.2 Hayes Dial-up Network with Repeaters .................................................................................................................... 51
7.4 Modbus/DNP Networks....................................................................................................................................................... 52
7.4.1 Basic Modbus RTU Network with Repeater ............................................................................................................. 52
7.4.2 Modbus with Modbus Query Enabled ....................................................................................................................... 53
7.4.3 DNP Network with Repeater ..................................................................................................................................... 54
7.5 Datagram Networks ............................................................................................................................................................ 55
7.5.1 Basic Datagram Network .......................................................................................................................................... 55
Appendix A Technical Specifications ..................................................................................................................................... 56
A.1 Type Approvals ............................................................................................................................................................... 56
A.2 Radio Modem Specifications .......................................................................................................................................... 56