The EXP40 Expansion Module is designed to enhance the flexibility and call-handling capacity of the SIP-T46G and SIP-T48G IP Phone. It features a backlit 160×320 Graphic LCD and provides two pages of 20 flexible buttons, paired with a dual-color LED.

The EXP40 Expansion Module is designed for use with Yealink's SIP-T46G and SIP-T48G executive colour screen IP Phone, and expand the functional capability of the 46G or 48G to a whole new level. It features a large graphical 160x130 pixel LCD screen, and ofers two pages of 20 flexible buttons that can be programmed to support up to 40 various features. The EXP40 Expansion Module can thus support productivity-enhancing features such as BLF/BLA, speed dialing, call forward, call transfer, park, pickup and many other operations.

Up to 6 EXP40 Expansion Modules can be connected to a SIP-T46G or SIP-T48G for attendant console applications, adding up to 240 additional buttons. Up to 3 EXP40 Expansion Module can be powered by the IP Phone they are connected to, otherwise a conventional power supply (5V/1.2A) is required where more than three Expansion Modules are integrated with an IP phone.