Operations and Maintenance Manual

MPR 4.1

Reader

Operating Instructions

Confidential UM UM360479-100 Revision: Draft B4 Page 21 of 246

All information contained herein is proprietary to, and may only be used with express, written permission from, Kapsch TrafficCom Canada Inc.

FILE: UM360479-100 REV B4 DRAFT WIP MPR-4.1 READER OPERATIONS AND MAINTENANCE MANUAL (002).DOCX 05/25/2022 11:18

Kapsch TrafficCom

2. OVERVIEW

Introduction

The MPR

4.1 Reader is part of the Electronic Toll Collection (ETC) Subsystem. Toll collection is the

primary use of the Reader.

Overview of the MPR 4.1 Electronic Toll Collection (ETC) Subsystem

The MPR 4.1 Reader is a single multi-protocol radio with four multiplexed ports. The MPR 4.1 is a

Nema 4 enclosed reader that can be pole or wall mounted. The reader operates from DC power (19 –

30VDC) and consumes 50 Watts of power. The reader can interact with both active and passive

OBUs.

Active OBU

For an active OBU, overhead antennas send out RF signals. As a vehicle equipped with an active OBU

approaches a toll zone, the OBU receives an RF signal from the antenna. The OBU then starts

transmitting data, which is received by the antenna and passed on to the Reader. The Reader

processes and logs the OBU data, and then sends the information to the Lane Controllers (LCs). The

Reader can also send data back to the OBU, such as an updated toll account balance.

Passive OBU

For a passive OBU, the antenna sends out a command or a continuous wave via an RF signal. As a

vehicle equipped with a passive OBU approaches a toll zone, the OBU receives an RF signal from the

antenna. If commanded, the OBU then starts transmitting data, which is received by the antenna and

passed on to the Reader. The Reader processes and logs the OBU data, and then sends the

information to the Lane Controllers (LCs). The Reader can also send data back to the OBU, such as an

updated toll account balance.

The MPR 4.1 is factory configured to enable all protocols.

For an in-depth description of protocols and the MPR 4.1 ETC Subsystem, see Theory of Operations

page 72.