Office Phone Systems: NEC, Nortel & Avaya

Telephone Number

" 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

NEC Phones Systems Dallas

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The Best Office Phone Systems Available Today

Tandem Data Telecommunications Solutions

Tandem Data is the leader in providing Business phone systems in Dallas/Fort Worth and Nationwide. We offer a variety of office telephone systems to fit your budget and business needs. Take some time to get familiar with our business telephone systems and request a quote today! We look forward to serving you!

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