Dallas Business Phone Systems is the premiere Avaya business phone system partner in the Dallas TX area. Avaya IP office 500 is the work horse in our Avaya lineup currently. Meaning we are your best option when evaluating local Dallas TX companies to purchase an Avaya business phone system from or to have service your legacy Avaya system such as the Avaya Partner Business Phone System. Our technicians have been servicing the Avaya Partner Business phone system for over 20 years, and we also sell equipment for the avaya partner system replacement handsets, analog cards or replacement systems. For your organizations needs when it comes to phone system sales and support with the Avaya partner system phone system needs contact us and we will be more than happy to assist. Avaya IP Office 500, Avaya Definity system.