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cabinet Door
cabinet Door

ALM Cabinet Door Sensor

The Adtran ALM Cabinet Door Sensor is a completely passive, fiber-based monitoring solution designed to provide 24/7 visibility of cabinet and facility door access at remote and unmanned locations. Cabinet Door Sensor is designed particularly for railway and utility environments and it enables operations teams to rapidly detect unauthorized access, vandalism and potential security breaches without requiring electrical power or batteries at the monitored location.

Cabinet Door Sensor is integrated with the Adtran Active Line Monitoring (ALM) platform, the sensor provides precise detection and location information whenever a monitored cabinet door is opened. In its normal state, the sensor generates an optical reflection. When the door opens, this reflection disappears, enabling ALM to identify which sensor has changed status and report the event within seconds. This helps operations teams respond quickly to the exact location being accessed.

Because the sensor is completely passive, there are no batteries to replace, no local power requirements, and no wireless or communication protocols to configure. Its passive architecture also eliminates the opportunity to jam wireless monitoring communications, helping improve security while reducing maintenance requirements and operational costs.

Multiple sensors can be daisy-chained on a single fiber link, supporting monitoring distances of up to 100 km. Event information can be centrally viewed through Adtran's network management environment with Fiber Director or compatible third-party NMS/GIS systems, making the solution suitable for protecting geographically distributed infrastructure.

Applications

  1. Railway Infrastructure: Monitors access to remote railway cabinets and enclosures and alerts operations teams when doors are opened.
  2. Utility Networks: Provides continuous monitoring of remote utility cabinets and facilities without requiring local power.
  3. Remote & Unstaffed Locations: Enables centralized monitoring of unattended locations, helping reduce the need for routine physical inspections.
  4. Cabinet Access Monitoring: Detects cabinet door opening and provides precise information about which monitored location has changed status.
  5. Facility Door Monitoring: Provides continuous real-time monitoring of facility doors from a centralized location.
  6. Unauthorized Access Detection: Helps operations teams detect unauthorized access, vandalism, and potential security breaches.
  7. Distributed Fiber Networks: Multiple sensors can be daisy-chained along a single fiber link for monitoring geographically distributed locations.
  8. Infrastructure Security Monitoring: Provides instant event notifications to improve the security and reliability of critical network infrastructure.

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ALM Cabinet Door Sensor
Features Specifications FAQ Downloads



Features
  • Completely Passive Operation: Connects directly to the fiber-optic cable and requires no local electrical power or batteries, simplifying deployment at remote locations.
  • Zero Maintenance: No battery replacement or local power-system maintenance is required, helping reduce maintenance visits, outages, and downtime.
  • Real-Time Door Monitoring: Continuously monitors cabinet and facility doors and reports changes in sensor status through the ALM platform within seconds.
  • Precise Event Location: ALM identifies which sensor has changed state, helping operations teams pinpoint the specific cabinet or door being accessed.
  • Up to 100 km Fiber Coverage: Long-range mode supports fiber links of up to 100 km, enabling monitoring across widely distributed infrastructure.
  • Multiple Sensors on a Single Fiber: Multiple sensors can be daisy-chained, simplifying installation and enabling multiple access points to be monitored over the same fiber link.
  • No Wireless or Protocol Dependency: No wireless connectivity, communication protocol setup, or configuration is required at the sensor location.
  • Resistant to Wireless Jamming: Because monitoring is fiber-based and passive, there is no wireless monitoring signal that can be jammed.
  • Centralized Management Visibility: Events can be monitored centrally through Adtran's management environment with Fiber Director or compatible third-party NMS/GIS systems.
  • Wide Environmental Operating Range: Designed to operate between -35°C and +75°C, supporting deployment in demanding field environments.
Specifications

Mechanical Specifications

 

Parameter

Description

Specification

Unit

Dimensions (W × H × D)

Plunger compressed with fiber connectors

23.75 × 125.45 × 92

mm

Plunger open with fiber connectors

23.75 × 146.45 × 92

mm

Mounting Options

Screw type

M4

—

Maximum screw length

6

mm

Mounting holes placement

52

mm

Weight

—

180

grams

 

 Optical Specifications

 

Parameter

Description

Specification

Unit

Reflection

Reflect band wavelength

1638–1700

nm

Insertion loss including connectors (typical)

0.6

dB

Closed state / Opened state

> -27 / < -35

dB

 

Long-Range Mode Performance

Parameter

Specification

Unit

Maximum Fiber Length

100

km

Maximum Fiber Loss

32

dB

Minimum Spacing Between Sensors

200

meters

 

Short-Range Mode Performance

Parameter

Specification

Unit

Maximum Fiber Length

20

km

Maximum Fiber Loss

28

dB

Minimum Spacing Between Sensors

5

meters

 

Environmental Specifications

Parameter

Specification

Operating Temperature Range

-35°C to +75°C

IP Protection

IP20 Compliant

RoHS Compliance

Directive 2011/65/EU and Delegated Directive (EU) 2015/863 – Compliant
FAQ

What is the ALM Cabinet Door Sensor?

The ALM Cabinet Door Sensor is a completely passive, fiber-based sensor designed for real-time monitoring of cabinet and facility doors. It works with Adtran’s ALM fiber assurance platform to detect door-opening events and identify the specific location being accessed.

How does the ALM Cabinet Door Sensor work?

Each sensor generates an optical reflection when the monitored door is closed. When the door opens, the reflection disappears. The ALM monitoring device detects this change and generates an alarm identifying which sensor has changed status.

Does the Cabinet Door Sensor require electrical power or batteries?

No. The sensor is completely passive and connects directly to the fiber-optic cable. It requires no local electrical power or batteries, helping reduce maintenance requirements at remote locations.

Can it detect unauthorized cabinet access?

Yes. The sensor is designed to help operations teams detect unauthorized access, vandalism, and security breaches by providing real-time information when a monitored cabinet or facility door is opened.

How quickly does the system report a door-opening event?

Changes in sensor status are reported by the ALM within seconds, allowing operations teams to quickly identify the specific location being accessed.

What is the maximum monitoring distance?

In long-range mode, the Cabinet Door Sensor supports fiber links of up to 100 km with multiple sensors. In short-range mode, the maximum fiber length is 20 km.

Can multiple Cabinet Door Sensors be installed on the same fiber?

Yes. Multiple sensors can be daisy-chained on a single fiber, simplifying installation and enabling several cabinets or doors to be monitored across a distributed network.

Where can the ALM Cabinet Door Sensor be used?

The brochure specifically positions the sensor for railway and utility environments. It is also designed for continuous monitoring of cabinet and facility doors, particularly at remote and unstaffed locations.

Can the sensor be monitored from a central location?

Yes. Event information can be viewed through Adtran’s management system with Fiber Director or compatible third-party NMS/GIS platforms, providing 24/7 centralized location monitoring.

Is the Cabinet Door Sensor vulnerable to wireless jamming?

The sensor does not rely on wireless communication. Its passive fiber-based design therefore eliminates the opportunity to jam the monitoring operation through its sensor communication, improving security for remote installations.

What operating temperature does the sensor support?

The ALM Cabinet Door Sensor has a specified temperature range of -35°C to +75°C.

What fiber connectors are used?

The ordering information specifies the ALM/DS Cabinet Door Sensor with LC/APC connectors.

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