If your business is moving offices, upgrading old wiring, or just tired of a server closet that looks like a plate of spaghetti, the contractor you choose matters. Structured cabling is the kind of project you really only want to do once — poor terminations, mismatched cable categories, and undocumented runs turn into expensive headaches years down the road.

We looked at cabling and network infrastructure contractors serving Connecticut businesses and ranked them based on experience, certifications, service area, and the breadth of what they offer beyond just running cable. Here’s our list.

1. Teleworks Communications — Glastonbury, CT

Best overall pick for Connecticut businesses

Teleworks tops our list for a simple reason: they do more than pull cable. Founded in 1997 and based in Glastonbury, Teleworks has spent nearly three decades building out structured cabling, fiber optic, and full network infrastructure for businesses across Hartford County and the rest of Connecticut.

What sets them apart:

• Strong, verifiable track record. Teleworks holds a 4.8-star rating across its reviews, with clients consistently praising the team’s responsiveness and technical know-how on everything from cabling to phone systems.
• Full-service infrastructure partner. Beyond structured cabling and fiber, Teleworks handles IT relocations, business phone systems, security and video surveillance, and business internet — meaning one contractor can manage an entire office move or build-out instead of juggling four vendors.
• Proven project volume. With thousands of completed projects and a reported 99% client satisfaction rate, Teleworks has built a reputation as the local alternative to out-of-state, online-only providers — with technicians who actually show up on-site.
• Local building knowledge. Nearly 30 years of working in Connecticut means Teleworks’ team understands local permitting and the quirks of older CT commercial buildings that national chains often miss.

If you’re looking for a Connecticut-based team that can design, install, test, and certify a structured cabling system — and stick around for the phone system, security cameras, and IT support afterward — Teleworks is the strongest all-around choice in the state.

📍 17 Parker Terrace Ext, Glastonbury, CT | teleworksct.com

2. NetLogix — Hartford, CT

NetLogix is a Hartford-based IT support company that also handles structured cabling and network wiring, offering both copper and fiber solutions. They lean into vertical-specific work, with experience supporting healthcare organizations on data security and compliance and schools on secure, scalable networks. Good fit for businesses that want cabling bundled with broader managed IT support.

3. SystemOne, LLC — Connecticut & Massachusetts

Tracing its roots back to 1998, SystemOne is a licensed electrical and communications contractor with a long list of institutional clients, including the University of Connecticut and hospitals such as St. Francis Hospital in Hartford. Their scale and public-sector experience make them a solid option for larger campus or healthcare cabling projects, though their size also means smaller commercial jobs may not get the same personal attention as a boutique local shop.

4. Extel Communications — Fairfield & New Haven Counties

Extel brings over 30 years of commercial network infrastructure experience, with technicians certified to BICSI and TIA standards. They cover design, installation, and testing/certification with detailed as-built documentation. Their coverage area is centered on Fairfield and New Haven Counties, so businesses in the Hartford area may be outside their core service radius.

5. Data Tel — Connecticut & New York

Operating since 1994, Data Tel is a licensed and insured cabling contractor authorized to provide manufacturer warranties for brands such as Mohawk, Hubbell, and Berk-Tek. Their long tenure and manufacturer authorizations make them a dependable, if more traditional, option — particularly for straightforward voice and data cabling jobs.

6. Alliance Communications — Connecticut

A Connecticut-based provider handling structured cabling planning, installation, and fiber optics for corporate, healthcare, and industrial clients, with added troubleshooting support after install. A reasonable regional option, though they publish less detail publicly on certifications or specific service areas compared to others on this list.

7. C-CO Technologies — Newtown, CT

A New England-based technology infrastructure company headquartered in Newtown, C-CO offers structured cabling alongside a broader product and solutions catalog, with a nationwide reach for multi-location clients. Worth a look if your business has locations outside Connecticut and you want one vendor to standardize infrastructure across states.

How to Choose the Right Cabling Partner

A few questions worth asking any contractor on this list before you sign:

• Are your technicians certified to BICSI/TIA standards, or manufacturer-certified (Corning, Panduit, etc.)?
• Will I get full test/certification reports and as-built documentation when the project wraps?
• Do you handle fiber, copper, or both — and can you scale with us if we add locations?
• Can you support us beyond the initial install (troubleshooting, moves, upgrades)?

For most Connecticut businesses — especially those in Hartford County who want a single local partner for cabling, fiber, phones, security, and IT relocations — Teleworks Communications checks every box. Learn more about the company’s Structured Cabling Installation services.

Ready to talk to a local team? Contact Teleworks for a free consultation.