Organizations use telemetry to monitor and control their remote assets. Traditionally a telemetry environment consists of a one or a number of remote sites at which Field Devices are deployed, each site is linked to a highly resilient central management system known as the Master Station. Field Devices provide a wide variety of alarm and statistical data that can be used to remotely monitor and control plant and other monitoring equipment.
The link between Master Station and Field Device can be provided by a variety of communication methods: PSTN telephone, satellite or GSM/GPRS/EDGE. In many cases, the Field Devices are installed in remote locations where the cost of land line installation is prohibitive, in such environments GPRS/EDGE has become the industry standard for remote connectivity. This is due to the ease of installation, and the low cost of data transmission.
This technique of remote asset management has been universally accepted as an essential business tool as it delivers the benefits of being able to reduce maintenance and operational costs, increase levels of monitoring and control of assets and to increase the efficiency of existing resources.
In the case of television broadcasting, equipment at repeater stations is one such asset.
Repeater stations extend the network coverage into areas where the signal from the main broadcasting stations would otherwise be too weak. A repeater station listens to the nearest main broadcasting station and then retransmits the unchanged signal. Repeater stations are often located in remote places where it is not feasible to install fixed line communications. With the implementation of the Mobile Router, equipment failures and alarms are reported to the Master Station timeously, reducing system downtimes. The Field Devices at the repeater stations are connected either directly or via protocol servers to a local Ethernet LAN on which the Mobile Router is configured as the gateway. Should an abnormal event occur, the Field Device sends an alarm to the management centre utilizing EDGE connection provided by the Mobile Router. The alarm is sent to a management centre where the appropriate action can be taken to restore the site to a full operational state. Examples of an abnormal event include transmitter power failure, transmitter signal loss or device overheating.
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