Business Phone Systems – Garland

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"We were looking for a single point of contact for our telecom service needs to handle our national footprint and supplement our corporate telecom department. Tandem Data is very responsive in getting our requests handled in a timely manner. I cannot imagine using another group after this experience."

M. Howsen, Director IT, Cross Point Funding

Avaya IP Office Special - phones Garland

Avaya Special - phones Garland

Avaya Certified Business Partner - phones Garland

Nortell Authorized Reseller - phones Garland

NEC Authorized Dealer - phones Garland

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Tandem Data Resource Group Phone Systems Garland

Connecting Companies for Tomorrow.

Nationwide Sales, Service & Support

Business phone systems, voice & data cabling, and wireless network design & installation. These are the products and services that have made Tandem Data Resource Group a leading name in the telecommunications industry and in the Garland area. But our reach doesn't stop there. We also have the experience and resources to extend our expertise in project management and implementation to clients with multiple locations across the nation. Tandem Data was created to provide a single point of contact for all your telecommunications needs while delivering industry leading customer service and support.

Business Telephone Systems
Tandem Data is a leading provider of business phone systems in Garland, for companies ranging from small to large. We sell, install, service, and maintain office phone systems from Avaya, NEC, Nortel and our own hosted virtual phone system in Garland and Nationwide:
On-site Systems

Avaya Phone Systems Garland
• Avaya IP Office

NEC Phone Systems Garland
• NEC SL2100
Hosted VoIP Phone System
  • Grows as you do, add new users in minutes, starting at $19.99 / month, call today at 972-820-8600.
  • All-inclusive phone system with voicemail to email, conference calling, find me - follow me, and more.
  • Easy to use with quick and friendly support
  • Highly secure with a fully redundant network to keep calls flowing
Legacy Systems
Voice / Data / Fiber Optic Cabling
Tandem Data is a low voltage cabling contractor that offers structured cabling installation and maintenance services both locally and nationwide. Whether you have a single office or multiple locations, we can be your single source office data cabling contractor to install the following:
  • Cat3, Cat5, Cat5e, Cat6 Cabling
  • Coaxial Cabling
  • Fiber Optic Cabling
  • Innerduct Installation
  • Conduit Installation
 Wireless Networking Solutions
Tandem Data provides expert wireless network planning, installation and support. By understanding the unique needs of a business, we can offer turnkey solutions including:
  • Indoor Wi-Fi and Wireless
  • Outdoor Wi-Fi and Wireless
  • Wireless Bridges
  • Wireless Backhaul
  • Wireless Voice Over IP (VoIP)
  • Indoor cellular and Distributed Antenna Systems


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 Garland Phones | Garland Business Phone Systems | Garland Telephone Systems | Office Phones Garland

14580 E. Beltwood Parkway, Suite 107, Farmers Branch, TX 75244 - Phone: 972-820-8600 Fax: 972-820-8610

Tandem Data: leading provider of business phones Garland. Hundreds of business phone systems Garland. Telephone systems from Avaya and Nortel. Office phone systems Garland.  wireless networking, paging systems, network design and installation, voice and data cabling Garland. Sales, installation, service, maintenance. Servicing the entire U.S.

Addison, Allen, Frisco, Carrollton, Coppell, Dallas, Flower Mound, Garland, Grapevine, Irving, Las Colinas, Lewisville, Lubbock, McKinney, Mesquite, Plano, Richardson, Valley Ranch