Telephone System User Guides

(Some links go to vendors web pages)

If Certified did not install or has serviced your system, we cannot answer any questions about how your system works or how to change programming. Please call the company that installed it for service. We only install and service in the North Alabama area and do not sell equipment or phones outside this area.

If you are in the North Alabama area and would like us to service your system please call us at 256 383-1225 to set up a visit.

  • NEC SL1100
  • NEC SV8100
  • NEC DSX-40
  • Vodavi STS
  • DESI, Telephone labeling Software
  • DESI Software, The lite version of DESI is free. You can purchase labels from DESI (50 label packs) or buy from Certified(1-50 labels). NEC labels are only available from Certified.
For older systems like the Sprint Protege MTX, LTX, CTX, Aries Digital, ESI/IVX or any other system we installed, Click here or please contact our staff @ 256 383-1225 or go to the manufacturer's web page.

These are a few or the areas we serve. Contact us for more information

Alabama: Sheffield, Florence, Muscle Shoals, Tuscumbia, Cherokee, Killen, Rogersville, Russeville, Red Bay, Haleyville, Winfield, Hamilton, Athens, Decatur, Huntsville, Hartselle

Tennessee: St. Joseph, Lawrenceburg, Loretto, Waynesboro, Savannah

Mississippi: Iuka, Corinth