Tests to check the correct operation of hardware and software. As digital systems continue to become more complex, built-in automated testing becomes an essential part of the equipment for tests during both manufacture and operation. This involves some extra hardware and software to make the tests operate. Digital systems with such provisions can often be quickly assessed by a trained service engineer, so speeding repair.

Remote diagnostics can make use of an Internet connection to monitor and test a product at the customer’s site while working from a central service base. Thus expert attention can be used immediately on site.

Interdependent multiple systems, such as a video server and its clients, may require simultaneous diagnostics of all major equipment. Here, combining data links from a number of pieces of networked equipment, as with Quantel’s R-MON, effectively extends the Remote Diagnostics to larger and more complex situations.

See also: Diagnostics