8Telecommunications requirements#

The telecommunications requirements defined in MRTS201 General Equipment Requirements apply to work provided under this Technical Specification.

Wireless communication shall be compliant to Australian Communications and Media Authority (ACMA) requirements. Each sign shall be durably marked internally to show sign type, serial number, date of manufacture, Regulatory Compliance Mark (RCM) and firmware release version. The details shall allow traceability of the sign manufacture, according to the Contractor’s quality system.

8.1Local site communications#

8.1.1Between TCMS and HHD#

Wireless connection between the TCMS and the HHD shall use local encrypted wireless communication technology. The HHD shall be as specified in Clause 7.2.

Communications messages between the TCMS and HHD shall include a checksum unique to each TCMS site and shall be computed based on the message information exchanged to ensure integrity of the communication is upheld.

The checksum shall be available for confirmation by the HHD and recomputed each time the message frames is changed and/or that the TCMS is reset / rebooted.

The message transition time, for any sign, shall be less than 10s.

Any radio frequency communications antennas shall be positioned at the highest point on the TCMS to make effective use of available signal gain and avoid line of sight signal attenuation by objects such as concrete barriers and shrubs.

8.2Remote site communications#

Where required, TCMS historical system information shall be made available to a remote monitoring system. This can be implemented via a secure wireless connection between the HHD and a remote server using a third party 4G/5G mobile service provider.

All communication over third party communications network shall provide adequate privacy and integrity of data to the satisfaction of the Principal.

The carrier selected shall have sufficient and reliable coverage at the project site.

8.3Communications timeout#

The HHD shall make provision for setting time-out periods which will prompt the user to log-in once it has expired. For any HHD or TCMS communications, the periodic timeout check shall be ignored, and the display shall remain on indefinitely until requested otherwise. All time-out periods shall be software configurable with ranges suited to the operating environment.