CALL 972.484.4900
972.484.4900 (DALLAS) 
817.529.1700 (FT. WORTH)


Business VoIP Phone Systems and More

Office Telesystems carries the top brand name business phone systems and related equipment on the market today, including cloud VoIP phone systems, premise based VoIP and digital phone systems, voice, data and video cabling and infrastructure, fiber and much more... [Read More...]

Service, Support, Maintenance Agreements

Office Telesystems offers service, support and maintenance agreements for every phone system and related product we offer. This includes support for our cloud phone systems, premise based VoIP phone systems, paging and audio visual, call management software… [Read More...]

We Specialize in Many Different Industries

Office Telesystems has serviced clients in many different industries, including: medical, assisted living, hotel and motel, insurance companies, advertising and marketing, real estate industry, auto dealerships, oil and gas, legal, food services, parts distribution facilities and more! [Read More...]

Read our Great Client

Read Office Telesystems client testimonials about our telephone system installations, service and support, including new system installations and more. Be sure to Google us for more. “I was impressed with Office Telesystems sales and technical staff … [Read More...]

Office VoIP Telephone Systems for Business | Dallas Fort Worth DFW Area Nationally

Office Telesystems provides the latest cloud and premise based VoIP and digital phone systems for Dallas, Ft. Worth, DFW area, regionally and enterprise business nationally. Office Telesystems also provides professional voice/data/video cabling and cabling infrastructure, installationsystem relocationssystem repaircall management softwareaudio visual systems and overhead paging systemscall recording solutions,maintenance agreements, service and consulting. VoIP and digital phone system product lines include NEC (including the NEC SV9100 Hybrid VoIP phone system and NEC SL2100!!), SamsungAvaya,
Mitelcloud phone systems from Netfortris Fonality and more!
With company roots going back over 30 years now, we understand that customer service is even more important than the right product. When it comes to a new phone system, the right product with the latest technology and features available is expected. Service and support are our customers' major concerns. Our goal is to provide every customer prompt, courteous and professional service along with efficient implementation and support of our customers product choice. Some companies offer only 1 or 2 phone system options, trying to fit a square peg in a round hole so to speak. At Office Telesystems we offer multiple options, offering product design options and flexibility in choice for your specific business needs. 

We are positioned to offer a complete unified communications solution for small businesses to enterprise Dallas, Fort Worth, the DFW metroplex. This also includes regionally and nationally.  
Office Telesystems continually evaluates our product lines to offer you the very best voice and network solutions for your business. Our product lines are carefully chosen to provide the latest technology, reliability, ease of use and return on your investment.


Cloud phone systems (also known as Cloud or Hosted VoIP) from Netfortris/Fonality are business grade cloud VoIP design. Specialized applications include hotel/motel solutions and call center phone systems as well. Network Services include Wireless applications, IT Support, VoIP applications, audio visual systemsnetwork switches and other specific products and services. Still have that 10+ year old phone system in your office? Used and refurbished business phone systems offered include Avaya/NortelAT&T Lucent Partner, Nortel BCM, Avaya/Nortel Option 11, 21, 61, 81, CS1000VodaviWIN and other major manufacturers.
We handle phone systems and related equipment from 3-30,000 endpoints or more in single and multi-office implementations and in premise based or cloud phone system design. Nationwide services are available. Our sales staff is trained to evaluate your business model and find the appropriate equipment and services to maximize productivity and profitability for your business. Check out our Products page for a long list of other unified communications products we carry, such as 
Call Management softwareCall Recording systemsOn Hold Marketing products and more! Maintenance agreements representing a flexible, defined warranty period on equipment and service are also available. Installations, service and repairs are completed by our expert technical staff. Our technicians are certified on the major brands we sell, resolving issues quickly the first time, costing you less for service and installation. Let Office Telesystems handle all of your unified communications and voice technology needs. Contact us today! 972 484 4900 in Dallas County or (817) 529-1700 in Tarrant county. We've recently moved into a larger facility with quick access to anywhere in DFW!

You can learn more on products and services we offer at our Blog Page.


 Kari's Law Compliance is Now a Federal Law 

Is your phone system in compliance with Kari's Law? It is now a federal law for your multi-line telephone system to support this dialing feature. Kari's Law requires direct access to 9-1-1 service without the user having to first dial an initial number, digit, prefix or other access number or code before dialing 9-1-1.
Learn more about 
Kari's Law. We can help. Contact our office today and get compliant! Compliance with Kari's Law was required by September 1, 2016 by the state of Texas and is now federal law as of 2/16/18. 

Office Telesystems is growing! Check out positions available at our Careers page. 

See our Blog Page

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