The Polycom VVX Expansion Module extends the functionality of Polycom VVX business media phones with multifunctional line keys that can be set up as line registrations, call appearances, speed-dials, direct station select or busy lamp field keys. The VVX Expansion Module seamlessly matches the look and feel of VVX business media phones. The only note of caution is that there is NO display, what appears to be a black and white display in the picture is not, it is only a label for each respective extension. If you want a digital display for the names/extensions this is NOT the model.
The Polycom VVX Expansion Module is compatible with the following Polycom VoIP Phones: