The current work horse of the Avaya business phone system ecosystem is the Avaya IP Office 500, when it comes to supporting your existing Avaya IP Office 500 business phone system or purchasing a new Avaya PBX the only option in Minneapolis St Paul  and surrounding areas Twin Cities Business Phone Systems. 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 partnter system phone system needs contact us and we will be more than happy to assist. Avaya IP Office 500, Avaya Definity system.