Office Telesystems is a veteran owned business that carries the highest quality cloud and premise based VoIP phone systems, along with other UC products and services for Dallas Fort Worth and nationally. This includes cloud VoIP phone systems (hosted, UCaaS, CCaaS) with VoIP phones from Yealink, Poly (formerly Polycom) and NEC Univerge Blue. Premise-based VoIP phone systems include NEC, Avaya and Mitel. Click on our Products and Service links for details. We also provide expert installation of structured voice, data and video cabling, overhead paging systems, audio visual systems, sound masking and more. See our new VoIP paging systems page!