High Reliability Systems AT&T Lucent Avaya

Welcome to High Reliability Systems!

Here at High Reliability Systems we specialize in the sales, service and installation of telephone, voicemail and data communications equipment. Infact, we are Wisconsin's largest independent AT&T/Lucent/Avaya dealer, providing high quality products, service and support for over 10 years!

We know what really matters to the customer: Dependable products, fast turnaround and service you can always count on!

Here is a brief summary of what we have to offer:


Preventative maintenance, as needed service and maintenance agreements to keep your system running right. Click here for more details!

Specialty / Hard to find items:

Backup media for all AUDIX, G3 and G3R systems, batteries for all cabinet styles, air filters for all cabinet styles and more. Click here for more details!


Full system rentals from our huge inventory of preowned equipment. Expedited service available, including next day installation. We rent our full product line. Call for details and availability. Click here for more details!

Conversions / Migrations:

Media conversions for G1 and G3 tape to flash card memory. G3R tape to magneto-optical disk storage. Click here for more details!

Installation / Redeployment:

New system installations large and small from our inventory of new and used products. Redeployment of systems you currently own. Click here for more details!


We provide a wide range of programming services for your phone and voicemail system including moves / adds / changes, trunk programming, call routing, vectoring, multi-site configurations and much more.