Operations and Maintenance Manual

_
JANUS
®
Multi-Protocol Reader 2.4 Appendix
Confidential UM 360467-110 Revision: B Page 239 of 247
© Kapsch TrafficCom Canada Inc. 2021
All information contained herein is proprietary to, and may only be used with express, written permission from, Kapsch TrafficCom Canada Inc.
FILE: UM 360467-110 REV B3 MPR 2.4 CLEAN.DOCX 03/02/2021 1:01
Kapsch TrafficCom
Differences between MPR2.4 and the Badger and JANUS Readers
ATTENTION 1: A JANUS Multi-protocol Reader 2.4 (MPR2.4) that is non-redundant uses primary-side
hardware components whereas the JANUS non-redundant reader uses secondary-side hardware
components.
ATTENTION 2: The software of a JANUS Multi-protocol Reader 2.4 (MPR2.4) that is non-redundant is
locked in Primary mode; the mode switch mechanical position is ignored. The software of a JANUS non-
redundant reader is locked in Secondary mode; the mode switch mechanical position is ignored.
Users familiar with the Badger Reader application for ORT must note the following changes with respect to the
use of the Kapsch TrafficCom JANUS ETC Subsystem:
Note 1: Connection of the JANUS Readers in an inter-Reader network allows adjacent Readers to vote on
the lane assignment used for the transaction report.
Note 2: Shared antennas are no longer required between Readers.
Note 3: The 4-channel scan configuration is no longer needed.
Note 4: Reporting latency is 50 ms for the JANUS MPR2.4 reader in multi-protocol operation, 25 ms for
JANUS MPR2.4 in TDM only operation , 5 ms for the JANUS Reader, and was 35 ms for the Badger
Reader. Use the configuration parameter LC Report Latency by Tag Type (on LC page) to slow down the
transaction reports to the LC for those legacy sites where the LC is expecting Badger Reader timing.
Note 5: There is no theoretical upper limit to the number of ORT lanes that can be supported with multiple
co-located Readers.
Note 6: The IAG-3 antenna is recommended for use in JANUS ORT applications. (The IAG-2 antenna
currently used in toll plaza lanes is not recommended.)
The JANUS and Badger Reader features are compared in Table 7-1.
Table 7-1: Important Differences between the Badger Reader and the JANUS Reader
Feature
JANUS
Badger
Notes
Performance Features
Synchronization
Y
Y
Compatible performance with Badger Reader 4
wire sync circuit.(Not compatible with IAG Reader
2 wire sync circuit). Only syncs on 8 or 10 channel
scan.
Reader redundancy
Y
Y
Automatic switchover upon failure to the
redundant Reader without data loss.
Variable channel scan configuration
Y
Y
Improve handshakes per channel for ORT
Cross Reader Algorithm (via tag)
Y
Y
Dependent on successful tag programming.
Cross Reader Voting (via Ethernet link)
Y
Dynamic Voting
Y
Channel weighting
Y
Y
Option to de-emphasize straddle antenna (ORT)