CMG-DCM units with integrated Iridium satellite modems can be deployed in remote locations. A new software stack allows for easy collection of system status and important events.
CMG-DCM with integrated satellite modem.
Satellite connectivity is the latest addition to our already versatile Data Communications Modules (CMG-DCM). We have now integrated a Motorola 9522A modem into the unit, making the DCM capable of connecting to the Iridium satellite phone network. This optional addition allows for rapid and reliable data collection, even from the most remote of locations. With a new software stack, written especially for this application, you can quickly and easily check the health and the status of the remote stations and download important events. In combination with a Network Appliance Module (CMG-NAM), our new receiving base station, this new option can be programmed to act as a fully automatic monitoring system.
Satellite connectivity does not have to be a power drain. Each DCM can turn its modem on at preset times, giving the user flexibility while keeping power consumption at a manageable level. The DCM can also be set to turn its modem on after an unexpected reboot, to aid diagnostics.
The base station software will dial out to each DCM system, establishing a PPP link. This can be done either by manual command or automatically, through the configuration of a weekly call schedule. If a remote system does not answer, the base station will keep trying to connect until it gets through. The call scheduler is set to prevent the system from making more than one phone call at a time.
An example status screen, highlighting one component requiring attention.
As part of this addition, Güralp Systems is unveiling a new software stack for the DCM. It has a more flexible internal architecture and a much improved user interface. The front page of the redesigned web interface is a colour-coded status summary, instantly showing the important details and highlighting any detected problems. An improved set of tools includes a system event log viewer, more flexible configuration, and an easy to use customisable menu system.
During a satellite call the status and system event logs are transmitted. These are stored on the CMG-NAM base station, for examination at the operator's convenience.
The new DCM software stack has a redesigned web interface, here showing the colour-coded system event log.
CMG-NAM network appliance module.
Remote system status and events summary page, colour-coded for instant summary.
The CMG-NAM is a network appliance running the Linux operating system. It can be configured in a variety of ways for different installations. Among other software, the CMG-NAM includes an automatic modem dialler and a remote system status/event viewer. This allows it to automatically connect to remote systems over a modem (satellite or otherwise) and query the system's status and event logs.
During a manual call, the CMG-NAM will forward IP packets destined for a remote DCM over the PPP link. This allows you to establish a connection through the web interface, and then connect via SSH or the web to the DCM from any machine on the local network.
The CMG-NAM is a flexible hardware platform in a standard 19" rackmount 2U form factor, and can be deployed for a variety of different purposes, including data acquisition via network, data storage and archiving.