Functions and contacts may be accessed quickly via 27 programmable soft keys. A dedicated headset port and Electronic Hook Switch support off­er enhanced usability for wired and wireless headset users. The optional ZIP 450M Expansion Module supports additional programmable keys. The ZIP 47GE is fully compatible with Zultys’ ZAC Unified Communication applications, allowing users to manage calls and messages directly from their computer. Like all Zultys phones, the ZIP 47GE utilizes the Session Initiation Protocol (SIP) open standard and is managed from the Zultys MX Administrator application for rapid deployment and the industry’s lowest total cost of ownership.