The self-developed test system D-Site is a novel system, which can be used in many different ways making the repair process of many devices easier. It is capable of checking even a large number of devices within a short period of time down to the last detail. In doing so, we make use of standardized and automated processes so that no deviations or lacks will arise during the process. With this process, which has already paid off for the largest cable network operator in Europe, already 150,000 Docsis 2.0 modem devices were processed at Synerlogis in 2010. The method of testing D-Site does not only offer the necessary tests of all relevant functions of a modem, additionally serial numbers and MAC addresses are automatically read out from the firmware of the modems and used for the automated and individual label printing.