Abstract: An attachable module for expanding or enhancing the functionality of a desktop telephone terminal is disclosed. The module comprises a body on which are mounted a display, a plurality of function keys and a scroll key, all of which are connected to electronic circuitry housed within the body. An appendage projects from the body and comprises a pair of upwardly extending toothed protrusions and an electrical connector. The protrusions and electrical connector are intended to mate respectively with a pair of complementary cavities and a complementary electrical connector located in the underside of the terminal. The appendage is comprised of several sections of varying dimensions, yielding a structure that, in combination with the body of the module, provides a strong and stable mechanical connection when the module attached to the terminal.

Abstract: The characteristics of a desktop telephone terminal can easily be enhanced or modified with the use of external devices such as personal computers. Different types of accessory interface cartridges are used for the different types of external devices. To facilitate attachment of the interface cartridges both electrically and mechanically, a stand is provided for supporting the terminal at different desired tilted positions and an accessory connection module (ACM) is mounted in the stand. The ACM has an electrical connection to the underside of the terminal and has one or more electrical connectors which are aligned with apertures in the stand. These apertures are accessible when the terminal is on the stand and permit plugging in of one or more of the cartridges.