Columbia Business Phone Systems has been providing sales, service, and support for the Avaya brand in the Columbia, South Carolina area for many years. They are currently their go to system and they have techs on staff both certified and extremely experienced in supporting this phone system. Their legacy system, the Avaya Partner system, was built to last and even now there are plenty of these phone systems in need of support. For any phone system needs, please contact them and they will be more than happy to assist. Thank you for your interest in Columbia Business Phone Systems!