Global Convergence

MRV Application Note: Out-Of-Band-Networking (OOBN)

MRV LX Series Security Application. 

This document provides a solution overview and instruction for using the capabilities of the LX Series sensor networking capabilities and an overview of the applications in which the MRV LX Series can be deployed to manage sensors and alarms in remote un-staffed facilities and other Lights Out Management (LOM) scenarios.

LX Series Sensor Networking Solutions

The MRV LX Series of Console Servers is designed for network administrators and system operators who are unable to afford the economic and business consequences of operational downtime. The LX Series is a complete console management, remote access service solution that allows network managers to proactively respond to all remote control, configuration, and data acquisition needs as if they were physically on-site by extending serial/console port access and facility alarm/remote power management capabilities over IP networks.  The LX family provides network and facility status visibility and control from virtually anywhere.

The LX Series features a wide range of port density and power options to fit a wide variety of applications.  Console server port densities range from 1-48 ports and include power options for AC, DC and redundant power as well as environmental and safety requirements such as the carrier class NEBS certification.

Sensor/Alarm Management

LX Series ports can be connected directly to the relay interfaces of discrete sensors/alarms. These connections enable network administrators to monitor and control alarmed devices such as doors, cabinets, or other alarms utilizing dry contacts from a central NOC.  Additional sensor/alarm capabilities can be accommodated, including gas sensors, fluids and pressure sensors by adding the 7204 Sensor Manager to the network. The 7204 is managed via any LX Series Console Server and provides up to 128 alarm ports supporting both wet and dry contacts. At an average cost of several hundred dollars per on-site service visit, you can expect a rapid return on investment (ROI) with an efficient remote access solution. The LX Series software enables each of the alarm management ports to represent pairs of sensor/alarm input and control output points. The alarm inputs come from input signals generated when contact closures change state. The control output points send output signals to activate devices such as relays, generators, lights, sirens, etc. in response to any contact closure signal the alarm inputs receive.

LX Series Console Server ports that are configured for sensor management are often connected to temperature and humidity sensors. These ports monitor the temperature and humidity readings of factory environments or data centers. Whenever a measured parameter changes beyond pre-set thresholds, an alarm signal is transmitted.

Alarm Notification and Automated Actions

The LX Series supports an automated "intelligent self-healing" capability, facilitates timely, intelligent and unmanned alarm and sensor device management.  Using this feature, network managers define specific alarm trigger conditions and can then associate them with corresponding remedial actions.  For example, turning on secondary air conditioning or notifying emergency personnel.  Consequently, any defined trigger condition that occurs at an alarm point automatically activates the corresponding self-healing action. With provisions to define as many as 255 trigger conditions and 255 actions, the self-healing feature enhances the reliability and availability of mission-critical networks and ensures highly predictable fault management.

LX Series - Security Application


  • Door sensor and IP Camera are connected to individual LX Series ports
  • Sensor networking capabilities are triggered by a contact closure which simulates the door of the facility opening
  • Once the door is opened, the LX triggers the camera to capture 5 pictures and send them to a central management location for review
  • The LX also sends an alert to the operator via the network or dialing out using the GSM/GPRS modem should the network be unavailable
  • Organization specific rules automatically notify different people depending on time of day or weekend coverage.

The introduction of the model LX-1004 GSM/GPRS, provides customers with more flexibility to address many physical infrastructure monitoring and security applications. LX Series models are available with either a V.90 or a GSM/GPRS internal modem.  If cellular or pager text messaging is required for a particular application and the site doesn't have access to an analog phone line, the LX Series can dial out using the internal GSM/GPRS cellular modem.

Using the modem, the LX can send key personnel critical text messages, customized to a particular organization when triggered events occur, 24 hours a day. Integrating the LX Trigger-Action and Notification features along with the use of sensor/alarm and control points, triggered actions will execute LX Command Line Interface (CLI) commands.  Sensor/alarm signaling can also trigger action commands to send notification text messages using TAP (Telocator Alphanumeric Protocol) services for SMS Messaging.

Today, inexpensive IP cameras are readily available.  These cameras can be configured to automatically download captured video for network access. Their triggering mechanism can be the raising and lowering of unique signal levels. Therefore, using LX Series' ability to raise and lower signals, IP cameras can be combined with LX Series features for a complete solution.




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