The Yealink SIP-T20P is an IP phone with a small footprint and a ton of great features. The Yealink T20P is a SIP phone that supports IP phone and can be powered via PoE or optional power supply. The T20P supports two VoIP or IP validated accounts and two line appearances. This Yealink phone has a graphical display, speakerphone, headset port, and nine fixed feature keys that make activating these features easy. The Yealink SIP-T20P is a popular phone because of it’s size, it doesn’t take up a lot of real estate on your desktop. However, this phone can be wall mounted if you prefer without needing to purchase any special mounting brackets.