Operations and Maintenance Manual

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JANUS

Multi-Protocol Reader Ver. 2: Operating Instructions

Confidential UM 360463-202 Revision: A12 (Draft) Page 24 of 291

These drawings and specifications contain confidential and proprietary information and are the property of Kapsch TrafficCom Canada Inc. and are issued in strict

confidence and will be kept confidential and used solely for the purpose intended and for no other purpose and shall not be transmitted, reproduced, copied, and/or

used as the basis for manufacture or sale of apparatus unless otherwise agreed to in writing by Kapsch TrafficCom Canada Inc.

FILE: MPR2_OPERATIONS_AND_MAINTENANCE-MANUAL_REV A12.DOCX 05/08/2014 11:24

Kapsch TrafficCom

2. OVERVIEW

Introduction

The JANUS® Multi-Protocol Reader Ver. 2 (MPR2) is part of the Electronic Toll Collection (ETC)

Subsystem. Toll collection is the primary use of the Reader.

How the JANUS MPR2 Electronic Toll Collection (ETC) Subsystem works

The MPR2 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 a RF signal from the antenna. The OBU then starts

transmitting data, which is received by the antenna and passed on to the Reader via a MRFM-S

module. 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 a RF signal. As a

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

antenna. The OBU then starts transmitting data, which is received by the antenna and passed on to the

Reader via a MRFM-S module. . 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.

JANUS MPR2 is factory configured to enable the specific protocols requested at the time of order.

While mulitple protocols may be displayed on the Web interface, only those protocols factory

configured at the time of order are active. To activate additional protocols after delivery, contact

Kapsch Sales.

JANUS MPR system components

Figure 2-1: A Redundant Reader shows a rack equipped with eight Smart MRF modules (MRFM-S).

A Lane Kit consists of:

 An antenna (see Figure 2-2)

 An MRFM-S( in Figure 2-1: A Redundant Reader)

 Two feedline adapter cable

 One Circulator

 One Circulator adapter cable. (3’5” for 902-904MHz, 3’3” for all other frequencies)