The KX-TGP500 series brings together all the advantages of modern internet HD Vo IP voice calls, classic business phone functionality & easy Web based administration, ideally suited to small of & branch office solutions. (* Please note that this product is for use with a VOIP line only & will not work on a standard telephone line.) With a high quality music-on-hold & answering Services you wont miss important calls, thanks to this phones integration with carrier class services. New messages are displayed on the handset, so you will know someone tried to reach you even if youre away from your desk. For added convenience you can check on messages from wherever you are, or away from the office, with the answering service alerting you when you receive a new message via SMS. When that happens, you can use remote features to access messages no matter where you are. Vo IP calling with High Definition Voice Performance Experience even great calling clarity when you make a Vo IP call over the internet. The TGP500 series devices support High Definition nition Sound Performance. This superior wideband audio quality lets you hear every detail in the other persons voice when they speak. Multi channel phone calls with multiline functionality The TGP500 SIP phones let you easily switch between 1 of 3 incoming lines at the touch of a button – so you can effortlessly choose the calls you need to answer. With extra handsets you can even experience the convenience of conference calling & letting you enjoy up to two, 3 party, conference calls at the same time. Alternately, 3 calls can be managed at once. Flexibility & Control Design & control how to manage your calls easily, by configuring the system exactly as you need, with easy to use Web based programming, a system can be changed quickly, & conveniently, adding new users in just minutes. Supporting for up to 8 SIP number (e.g. up to 8 Direct Inward Dialling Lines or Extensions) The TGP500 series means that you can have up to eight (8) phone numbers. You can set up in many ways: choose a unique number for each handset, or you can program the handsets into groups for central call handling. ADDITIONAL HANDSET FOR THIS PHONE The correct additional handset for this phone is available here.