| 摘要 |
Network congestions can largely be combated by preventing a congested point being approached right back at that network location where a new connection is initiated. To combat network congestions, at certain (important) points (A) at which new connections are initiated, the chosen (intermediate or final) destinations are automatically subjected to an investigation as to whether the chosen destination is or is not available at that instant. In a dynamic filter (F), destinations which appear to be unavailable are recorded for a certain, optionally variable, relaxation time in order thereby to hold back calls intended for such congested destinations for said relaxation time. <IMAGE>
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