Our technicians can assist in simple programming changes, system upgrades or advanced troubleshooting of your Avaya IP Office telephone system. Armstrong Communication System supports The IP Office 400, 412, 500 and 500 v2. We are an Avaya business partner and can provide any telephones, expansion modules or licences that you would need to upgrade or expand your telephone system. We can support the IP Office, Voicemail Pro, Contact Center and more.