An SDB term. A worktop is a Security Database entity (object) that refers to a device, or a collection of devices, that are associated with the host name or IP address of a workstation. A worktop can consist of a client telephone (the worktop’s primary device) and any number of additional telephony devices (such as fax machines or modems), which are specified through the worktop’s secondary device list. The telephone extension is usually the Primary Device ID attribute in the Worktop object.