The 3Com NBX 3102 Business Phone (3C10402B) is a next generation design focused on telephone voice quality by featuring enhanced acoustic design and by leveraging the emerging wideband audio standard, which significantly enhances speech transmission compared to conventional public switch telephone network (PSTN). The 3Com 3102 Business Phone (3C10402B) also includes convenience and productivity features that make it an advanced business tool. This phone is identical to the 3C10402A, except it is compliant with the European environmental regulation known as ROHS.