The expansion module expands the functional capability of your sip phone to an advanced level. It features a large graphic LCD. Two pages of flexible buttons are shown on the display can be programmed up to 40 various features, the productivity-enhancing features include BLF/BLA, speed dialing, call forward, transfer, park, pickup, etc. **Please note that this device is NOT configured to operate with either BT Cloud Voice and/or BT Cloud Phone services. For further information on how to order the correct device for these services, please contact the respective helpdesks: BT Cloud Voice = 0800-3890537 and BT Cloud Phone = 0800-389 0598.”**