VoIP IAD
Is a multi-functional networking device (Integrated Access Device or multiservice access gateway) that provides a WAN-access interface in addition to IP routing and a voice gateway services (see What is a VoIP Gateway?). Installed on the customer premise, the VoIP IAD is classified as customer-premise equipment (CPE). While there is some debate on the topic, a VoIP IAD is generally considered to be more efficient and cost-effective than a multi-unit CPE solution for most business-class IP-telephony applications
