direct works with phone systems as well as with selected telephones (without a phone system). For communication with a phone system, direct uses a telephony server like TeamCall^® or TeamCall^® Express. This server typically is connected to the phone system via the network. Check out our list of compatible phone systems on this page.

TeamCall is available for Mac OS X, Windows, Linux, and Sun Solaris.

TeamCall Express uses the phone system's TAPI driver. Due to its use of TAPI, TeamCall Express is only available for Windows 2000, 2003, and XP. The TAPI driver must support the creation of multiple TAPI lines (so called 3rd-party-TAPI).

To connect to a compatible telephone, a simple cable is all you need. Check out our overview of compatible phones.