Definity processor and control packs provide complex communication control for the Avaya Definity PBX. We carry a huge selection of all types as well as on site support and Definity maintenance services.
The TN790B is very similar to the TN790. The circuit pack is designed to handle errors that are associated with the EM-BUS and is required for use of the C-LAN (TN799) and NetPkt (TN794) circuit packs in R7 and later. One Year Warranty 30 Day Money Back Guarantee FREE SHIPPING Call Us At 1-800-335- Learn More