The affordable Yealink T40P comes equipped with enhanced call management including busy lamp field (BLF) keys, 3 way calling and three pages of 6 configurable buttons on the backlit display.
 
The T40P has been certified to work with a range of software providers such as 3CX, Asterisk and BroadSoft Broadworks.
 
Yealink SIP-T40P Features and Functions:
Up to 3 SIP accounts
132x64-pixel graphical LCD with backlight
Highly secure transport and interoperability
Wall mountable with adjustable stand
PoE and EHS Support
HD voice: HD handset, HD speaker
Supports PoE, Power Supply also available separately