Aiphone is one of the most respected and reliable brands in the communication systems industry. With nearly 40 standard systems, Aiphone can create a system for almost any intercom application. – With 20 years of experience, Keri Entraguard provides its customers with systems from single door to enterprise-class and everything in between. Their systems are cost effective and unique in design and functionality. Telephone entry and access control have come together with the Keri Systems Entraguard product line. Viking Electronics manufactures telecommunications and security related products for small businesses. Their products are set apart from their competitors for their simple design, ease of use and cost effectiveness.