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FDN Enclosure Support Arm

Cubis’ universal FDN enclosure support arm has been designed and developed to provide a ‘Mobra Arm’ solution that fits all major FDN enclosures (Fibre Distribution Nodes) within one of Cubis’ STAKKAbox™ range of access chambers.

Mobra Arms are commonly used to house, manage, and protect fibre connections within a wide range of underground, direct burial and aerial networks. With the vast array of FDN enclosures currently on the market (each having their own mounting requirements), their placement within a chamber can often be an afterthought. This irregularity leaves the fibre network infrastructure suppliers the challenge of how and where to mount the enclosure, depending on its size and the chamber that suits the specified application for installation.


Cubis’ Mobra Arm system can be configured to give the installer ultimate flexibility depending on the FDN required. This is done through its configurable cross-brace and telescopic arm assemblies that are adjustable both in width and height.

FDN Enclosure Support Arm Flexibility

Seamless Integration

Providing a seamless integration between Cubis’ STAKKAbox™ chamber access systems and the management of fibre connections, the Mobra Arm securely mounts within the chamber system to deliver ease of access and greater comfort for operative while working.

FDN Enclosure Support Arm Seamless Integration


The Mobra Arm’s configurable cross-brace and telescopic arm assemblies are adjustable both in width and height. The cross-brace has been designed to provide central or off-set fixing within the chamber for installation of two FDN’s if required and a lock in place hinged bracket.

The telescopic arm provides set incremental jumps in height for greater comfortable working height for operatives whether sitting or standing.

FDN Enclosure Support Arm Adjustability

Intelligent Design

The mounting bracket assembly has been designed to provide a range of mounting positions for the FDN enclosures depending on the required FDN. The mounting allows for ease of removal, orientation of enclosure and secure fixing points.

FDN Enclosure Support Arm Intelligent Design

System Components

Cubis' FDN enclosure system typically comprise of the following products:

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