Avaya EC500 Concepts / Setup What is EC500 Extension to Cellular (EC-500) is a feature that allows users to control how they receive the calls that come to their Avaya desk telephone. By enabling the EC-500 feature, calls can ring on the users’ desk telephone and on their cellular telephone simultaneously. The user can then choose which device they wish to use for answering the call. Additionally, the user can choose to seamlessly transfer calls between the two devices. For Example, when a call arrives on a users Avaya phone. The Avaya phone will use a second line and call the users predefined mobile number. When the user answers the mobil

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