Cisco CP-7915 Expansion Module The large LCD display of the Cisco Unified IP Phone Expansion Module 7915 allows for quick and easy identification of associated buttons Using the Settings menu of the Cisco Unified IP Phone 7962G, 7965G, and 7975G models, you can adjust the contrast of the individual LCDs for these phones and the Cisco Unified IP Phone Expansion Module 7915 according to your preference. You can program the buttons on each Cisco Unified IP Phone Expansion Module 7915 as a directory number, line key, or speed-dial key, much like on the Cisco Unified IP Phone 7962G, 7965G, and 7975G models.