The EXP40 Expansion Module for the SIP-T46S, SIP-T46G, SIP-T48S and
SIP-T48G, expanding the functional capability of your sip phone to a whole
new level. It features a large graphic LCD. Two pages of 20 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.