Abstract: In one aspect, a method for redundant data management in computer networks, wherein data is redundantly stored in a plurality of computers is provided. The data management application programs used for the computers have a coinciding address identification, which the application programs have as component of a virtual sub-network of a computer network. The computers are independent of one another and have routing functions via which the application programs are accessed. The redundant data management is invisible for the user.

Abstract: In the method, a call setup in an ISDN communication network (ISDN) is initiated from a further communication terminal equipment (KEX) to a communication terminal equipment (KE) whose performance features are to be influenced. At least one setting information (esi) that influences a performance feature as well as an activation signal (aki) is communicated to the communication terminal equipment (KE) via a user--user information element (uui) that is standardized in the draft prETS 300 286 and inserted into the ISDN signaling information (si), and the call setup is subsequently ended. Initiated by the activation information (aki) and during the set up connection or after the cleardown of the connection, the respective performance feature of a service is automatically influenced in the communication terminal equipment (KE) according to the communicated setting information (esi). A remote control of performance features of services in ISDN communication networks is possible with the method.