Siemens Optiset Advance Plus system telephone for the Siemens HiCom and HiPath business telephone systems. In addition to the features of the optiset E standard, the optiset E advance models have two adapter slots. Equipped with a headset and PC connection they are suitable for use in a call center, for example. The optiset E advance plus offers the user the same level of features as the optiset E standard, whereas optiset E advance lacks the handsfree function. The optiset E advance conference boasts a new extended handsfree facility of outstanding quality that is as clear as using the handset. Available in black or white