This Recommendation provides the general principles associated with ISDN test calls originating from a test system and terminated by a test call responder. It lays down the requirements associated with test calls and lists the facilities that should be provided by a test call responder.
Keywords
– bearer type;
– ISDN network;
– ISDN nodes;
– ISDN test calls;
– teleservice;
– test access;
– test responders;
– test systems.