As the premier Avaya business phone systems partner in the Concord, NC area, Concord Business Phone Systems is your best option for all of your Avaya IP office 500 needs. Our technicians have been servicing the Avaya Partner business phone system for over 20 years, and we are also knowledgeable about replacement handsets, analog cards, and replacement systems. We are dedicated to providing our customers with the best possible service and support, and we are confident that we can meet all of your needs. Contact us today to learn more about our services or to schedule a consultation. We look forward to serving you. Concord Business Phone Systems is committed to providing our customers with the best possible service and support, and we are confident that we can meet all of your needs. Contact us today to learn more about our services or to schedule a consultation. We look forward to serving you.