The EXP40 Expansion Module is designed to enhance the flexibility and call-handling capacity of the SIP-T46S, SIP-T46G, SIPT48S 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-T46S, SIP-T46G, SIP-T48S and SIP-T48G executive colour screen IP Phone, and expand the functional capability of the 46G/S or 48G/S 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.