In-Building Connectivity

Granite steps in, offering business-grade Wi-Fi solutions when business struggle to get reliable service caused by challenges posed by complex wiring environments

It’s all easier when done digitally

Amplyfing Your Coverage

Whether you are operating a large office, factory, or warehouse, Cel-Fi installed by Granite’s certified technicians is the perfect solution for you

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common features  

Build Better Infrastructure

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24/7 Technical Support

Our IT Field Services operate round the clock, every single day of the year.

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Customer-centric Approach

We uphold a philosophy of reacting promptly, responding effectively, and simplifying complex problems. We don’t just fix issues; we aim to provide seamless solutions that enhance your overall operations.

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Expert Technicians

Our expert technicians are equipped to handle the installation, configuration, and maintenance of servers, routers, switches, and firewalls, providing peace of mind that critical network components are in capable hands.

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Network Distribution

Our knowledgeable team will perform engineering surveys including heat maps, design and implement the ideal configuration for your business, optimizing your network’s performance.

Server Room

Backbone of Your
IT Infrastructure

Our range of cabling options includes Cat5e, Cat6, Cat6a, Cat7, and Cat8, ensuring that we can cater to your specific needs. Additionally, we provide fiber backbone solutions with single-mode fiber (SMF) and multimode fiber (MMF) options, further enhancing the reliability and efficiency of your network.

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Rack & Stack

Our technicians excel at hardware rack & stack operations, optimizing space utilization and minimizing cable clutter, thereby enhancing the overall performance and manageability of your IT infrastructure.

Boosting Efficiency & Performance Is Easy

How Your Business Can Benefit

In-building cellular solutions, such as Distributed Antenna Systems (DAS), offer comprehensive and reliable coverage within buildings. These solutions amplify the wireless signals, ensuring that Smart Building IoT applications operate seamlessly across all areas, from basements to top floors. With enhanced connectivity coverage, occupants can make crystal-clear calls, enjoy high-speed data transfer, and experience uninterrupted connectivity throughout the building.

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Still Have Questions?


With Granite, you can say goodbye to the hassle of dealing with multiple vendors and complicated billing processes.

We offer a seamless and streamlined experience, providing you with a 360-degree view of your services across North America and One Bill for your complete business solution.

This consolidated approach saves you time, money, and eliminates the frustration of managing multiple accounts.

BICSI, which stands for Building Industry Consulting Service International, is a professional association that supports the advancement of the information and communications technology (ICT) profession.

With a vast membership base of over 26,000 professionals and credential holders, BICSI is the preeminent resource for the Connected World.

RCDD stands for Registered Communications Distribution Designer®. It is BICSI’s flagship program that focuses on the design and implementation of telecommunications distribution systems.

The RCDD certification ensures that individuals possess the necessary knowledge and expertise to create reliable, efficient, and scalable ICT infrastructure solutions.

Being an RCDD means being acknowledged by your peers and industry professionals as a subject matter expert in designing and implementing telecommunications distribution systems.

For more information on BICSI or the RCDD Certificate, please visit BICSI’s website: BICSI Registered Communications Distribution Design (RCDD®) | BICSI

While all three solutions aim to enhance wireless coverage, they have key differences in terms of coverage area, capacity, deployment flexibility and endpoint connectivity

[Note: Wi-Fi is a completely different technology than Cellular/Carrier solutions.  Unfortunately, this confusion is getting more common with Wi-Fi 5Ghz and Wireless 5G popularity/marketing]

End user devices examples:

  • Mobile phones typically support both Wi-Fi and Cellular connectivity
  • Most laptops (especially older laptops) typically only support Wi-Fi connectivity

Click here for more information Wi-Fi_FAQ3_Matrix


  1.  Active DAS Hybrid – Granite Offering – Cel-Fi Solutions
  • Active DAS Hybrid is a unique distributed antenna system (DAS) category that provides outstanding network coverage using active signal amplification components at an affordable cost. The lower cost is achieved by using a blend of category cabling and fiber to distribute off-air signals that do not require the same level of carrier support as legacy DAS systems. Cost savings are realized across the board – in hardware, cabling, install time, labor, and set-up / commissioning.
  • Active DAS Hybrid can be installed using Power over Ethernet (PoE) – a low cost and easy to deploy technology.  Active components in Active DAS Hybrid include network units that collect the signals off-air, clean them up, digitize them, and send the signals to the coverage unit.  The coverage unit then converts back to RF and distributes the noise and echo-free signals. Active or passive antennas may be incorporated, as well as IoT sensors and other Industry 4.0 devices.
  • Active DAS Hybrid systems, such as those designed and produced by Nextivity, have been approved for use by more than 200 operators in more than 100 countries and are unconditionally network safe. These systems are one of the most cost-effective ways to bring the power of the macro-network inside a building.
  • Components in Active DAS need power to operate and active systems typically use fiber optic cable to connect with remote sources. Passive DAS don’t use fiber, most components don’t need power, and are often comprised of simple Bi-Directional Amplifiers (BDAs).
  1. Active/Legacy DAS
  • Large systems/expensive/installations can take ~9-18months
  • A legacy DAS is a network of antennas positioned to distribute signals across a large area. They can be deployed indoors or outdoors and are traditionally used to deliver extra cellular capacity and coverage to a high-traffic area such as a stadium, airport, or other venues with high concentrations of wireless device users.
  • Common manufacturers are CommScope and Corning
  • Active DAS systems are expensive to deploy and require routine maintenance to operate effectively. Other characteristics of Active DAS include:
  • Maximum coverage and capacity
  • RF Engineering expertise required to design and install systems
  • Carrier agreements required – can take time (6-12 months typically), especially if multiple signals are needed (neutral host)
  • Require fiber backhaul and a at times a base station, adding to the cost
  1. Passive DAS
  • Passive DAS use BDAs (Bi-Directional Amplifiers) to rebroadcast signals, putting them in a different category of signal amplifier than Legacy DAS or Active DAS Hybrid. These “dumb repeaters” use passive components throughout, resulting in noticeable signal loss / degradation.