Cisco 7915 Unified IP Phone Expansion Module (Refurbished)Call coverage is a critical capability for administrative assistants and others who must monitor, manage, and cover the status of calls. This capability requires the ability to instantly determine the status of numerous lines beyond the six line capability of the Cisco Unified IP Phone 7962G and 7965G models and eight line capability of the Cisco Unified IP Phone 7975G. The primary function of this module is to provide the Cisco Unified IP Phone