A customer wants to implement the Avaya IP Office solution. They have five analog lines and would like to implement a basic four-port voicemail with an Auto Attendant. They would like to use Phone Man

A customer wants to implement the Avaya IP Office solution. They have five analog lines and would like to implement a basic four-port voicemail with an Auto Attendant. They would like to use Phone Manager Pro on four PCs with basic call monitoring using the Compact Business Center application. How many servers will they need to accomplish this?