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Demarcation Enclosures

Wall Termination Enclosures

RNI Boxes

A demarcation point involves the connection location where customer-owned telecom equipment links to the public network's wiring. These low-voltage connections require remote network interface (RNI) boxes, cabinets or junction enclosures for protection against potentially damaging elements like water, ultraviolet ...

Steel Boxes

Multilink engineers and manufactures Multiple Dwelling Units (MDU), Plastic Demarcation Enclosures, Environmentally Controlled Enclosures, Backhaul 12RU, Ground / Wall / Pole Mount, OTN Cabinets, and custom specification solutions. Products are available in plastic, steel, stainless steel, and aluminum materials. Our ...

Multi-Media Enclosure

The ultra modular Multi-Media Distribution Enclosure (MDE) provides both wireless and wired connectivity in premise installations structured for residential MDU’s, Business Applications, ONT, BB, Brownfield, Greenfield and FTTX requirements. View other demarcation enclosures available here.

Custom Enclosure

Multilink offers completely customized enclosures. Configure one that meets your applications needs and submit it for a fast quote.

Demarcation enclosures offer protection for important telecommunications equipment — they aren't the place to skimp on quality. At Multilink, we carry a variety of demarcation enclosures and can custom-build new ones so that you can find the ideal fit for your application. We design, manufacture and test these plastic demarcation enclosures according to standards from the ISO 9000 Series and are always working to meet your needs in innovative ways.

Let's take a closer look at demarcation cabinets and the solutions we have available.

What Is a Demarcation Cabinet?

A demarcation cabinet is the point where third-party customer-premise equipment, such as internet access equipment, links up to public networks, like the Public Switched Telephone Network (PSTN) in the United States. These cabinets, junction boxes or enclosures serve the physical purpose of protecting the connection points and cables from unauthorized access, electrical damage, water, insects and ultraviolet (UV) rays. They also have more logistical benefits, like delineating responsibility for wiring, equipment and maintenance.

These weatherproof enclosures are regulated by the Federal Communications Commission (FCC) because they need to meet stringent protection requirements for telephony demarcation. They can come in a range of styles to suit different environments and aid in security and cable management, as well as more specialized demands.

Typically, demarcation cabinets are used for organizations, campuses and multifamily dwellings. The demarcation point for residences can be as simple as the place where the coaxial cable or other wiring enters the building. 

Demarcation cabinets usually consist of a tough, impact-resistant thermoplastic alloy, with a weatherproof cover design and seals. They may also have room inside to allow for a wide bend radius and to store enclosure accessories like extra cables, filters, splice trays, splitters, amplifiers and more.

What Is a Fiber Demarcation Box?

A fiber enclosure is a type of demarcation cabinet, housing the demarcation point between the customer premises equipment — like routers, Voice over Internet Protocol (VoIP) gateways and switches — and the fiber optic cable of the local access provider. It creates a secure space for splicing, storing, splitting and otherwise handling fiber optic cable.

RNI Boxes

We offer various sizes of RNI boxes in single and double door configurations. Our engineers develop our RNI boxes with UV-stabilized materials for years of outdoor service. Multilink RNI boxes deliver features such as:

  • Multiple adapter assembly and mounting bracket options
  • Easy mounting with FlexGrid™ technology
  • Better cable management with Velcro® straps


Steel Multiple Dwelling Units

In applications involving multiple dwellings, a steel multiple dwelling unit (MDU) protects fiber optic and coaxial cables. Our MDU designs minimize pry points to protect their contents from theft or tampering. Multilink MDUs provide the following benefits and features:

  • Integrated electronic components and wiring in accordance with Six Sigma standards
  • Available in various materials and knockout styles
  • Mounting styles that include ground, wall, pole and unistrut


Multimedia Enclosures

Multimedia distribution enclosures (MDEs) provide a centralized location for distributing and installing multi-play services. They work well with wireless and wired connections for in-premise installations, allowing them to function well as OTN cabinets and in both business and residential applications. The advantages of our MDEs include:

  • Adaptable to multiple network technologies
  • Plastic construction for reduced electrical interference
  • Improved heat dissipation through built-in louvers

Custom Demarcation Boxes

If you have specific enclosure requirements that you can't address with our standard products, consider one of our custom solutions. Our online customization form makes it fast and easy to order the exact design you need. Thanks to our robust custom capabilities, you can specify these features of your enclosure:

  • Box style
  • Plate requirements
  • Box dimensions in feet, inches or meters
  • Door configurations
  • Number of locks
  • Type of lock and security bolts
  • Knockout style
  • Box color and material
  • Plate type
  • Board type
  • Wiring type
  • Additional options such as thread size and special plates

Options like these allow us to create demarcation boxes built for even the most niche of applications.

Additional Custom Capabilities Available

In addition to custom demarcation boxes, we offer customized versions of many of the products available on our website. If you need a solution to go with your custom demarcation box, we can help you build a design that meets your networking requirements. Our team of engineers can partner with you to create a product to your specifications throughout design, manufacturing and testing. We follow ISO 9000 standards and perform in-house lab testing on all of our custom and standard products.

Versatile Solutions From Multilink

At Multilink, we know that telecommunication networks require versatile solutions that meet the demands of intricate systems. To help you establish as many parts of your network at once as possible, we provide these capabilities:

  • Universal products: Many of our products have universal designs that allow you to use them with other equipment models. We can also provide customization services for further help with integrating your network equipment.
  • Bundling options: We can use our knowledge of our catalog to deliver a single-source networking solution. Upon request, our team will recommend products to bundle with your purchase to help you save money and time.

Get a Quote Online

Our online quote process allows you to specify your plastic demarcation enclosures using familiar online shopping features — just add the products you need to your shopping cart, then complete the checkout process. Our team will contact you to talk about bundling options, pricing, shipping costs and any custom specifications. You can also contact us directly with any questions.