Operations and Maintenance Manual

MPR 4.1

Reader Maintenance Instructions

Confidential UM UM360479-100 Revision: Draft B4 Page 101 of 246

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FILE: UM360479-100 REV B4 DRAFT WIP MPR-4.1 READER OPERATIONS AND MAINTENANCE MANUAL (002).DOCX

05/25/2022 11:18

Kapsch TrafficCom

ORT lanes allow OBUs to cross multiple capture zones which may cross between readers. The Readers

should assign an OBU to one RF Port to prevent duplicate transactions.

Figure 5-13: Two Readers communicating with one OBU

Selecting the correct communication method between reader

The communication method determines how Readers communicate with each other to share

information for determining lane assignments. This is important for situations similar to that shown in

Figure 5-13, where, to assign the OBU to a lane, Reader 2 and Reader 3 need to share handshaking

information. The available communciation methods are:

Legacy CRA: there is no physical link between the Readers, such as an IR Network. Instead, the first

Reader to contact an OBU, programs the OBU. All other Readers that subsequently contact the OBU

recognize it was recently programmed and ignore the OBU.

Note: CRA only works on the TDM protocol when it is write enabled.

Note: The Reader ID number on the Tag Programming tab must be different for each reader.

Note: The Plaza ID number on the Tag Programming tab must be the same for each reader.

Note: The readers must be time synchronized

Note: The transponder timeout, set in the Group panel on the Channels web page, must be

greater than the time difference between all Reader clocks in the network.

Ethernet: An IR Ethernet network connects the Readers together and handshaking information is

shared between Readers. The Readers assign the OBU to one Port and all other transaction reports

from other Readers are suppressed. Reader information is only shared between one reader and the

reader on either side of that reader.