The Tadiran EXP40 Expansion Module for the T48G, T46G, T42G, T41P and T40G, expands 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. This unit contains a specific Tadiran chip set.