Product DescriptionThe Yealink EXP20 IP Phone Expansion T2X Series is an expansion module that provides added operational functions and simplifies user navigation when used with Yealink SIP-T27P and SIP-T29G IP phone models. Measuring 160x320 pixels, the YEA-EXP20's large and user-friendly liquid crystal display (LCD) interface contains 20 physical dual-color LED Keys. Funtionalities of this expansion module include, speed dial, BLF, BLA, call forwarding, and transfer and hold, which make the YEA-EXP20 a perfect IP phone system for receptionists and call center emvironments where there is a great need to monitor and manage large volume of calls on a regular basis. This expansion module allows users to daisy chain up to six XP20 phone systems.