Business Phone Systems

Office Phone Systems in Dallas & The Metroplex

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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 Dallas

Avaya Special - phones Dallas

Avaya Certified Business Partner - phones Dallas

Nortell Authorized Reseller - phones Dallas

NEC Authorized Dealer - phones Dallas

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Get answers to your questions about phone systems, voice and data cabling, wireless networking and paging systems using our information request form.

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Tandem Data Resource Group
Business Phone Systems Dallas-Fort Worth

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 Dallas-Fort Worth 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 Dallas-Fort Worth, 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 Dallas and Nationwide:
On-site Systems

Avaya Phone Systems Dallas

Avaya IP Office

NEC Phone Systems Dallas

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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