An SS7 Network Preventative Maintenance System for detecting potential SS7 and switched network troubles, automatically analyzing the troubles, providing alarm and corrective action to avoid major network events. Real time monitors on SS7 links at the STP provide information on exceeded link load, exceeded...http://www.google.de/patents/US5475732?utm_source=gb-gplus-sharePatent US5475732 - Common channeling signaling network maintenance and testing