Take the functional range of your SIP telephone SIP-T46G, SIP-T46S, SIP-T48G, SIP-T48S to a whole new level with the EXP40 expansion module: Its large graphic LCD display offers space for two pages with 20 flexible keys each - and thus enables you to assign up to 40 additional function keys: with BLF/BLA, speed dial, call diversion and call forwarding, parking, call pickup and many other functions.