Our new, refurbished and used Cisco Unified IP Phone Expansion Module 7914 extends the capabilities of the Cisco Unified IP Phones 796XG/G-GE and 797XG/GE with additional buttons and an LCD display. This expansion module adds 14 buttons to existing Cisco Unified IP Phones 796XG/G-GE and 797XG/G-GE and you may use up to two Cisco Unified IP Phone Expansion Module 7914s per phone.