Inspec keywords: security of data; telecommunication network routing; telecommunication traffic; telecommunication computing; telephone networks; telephone exchanges; software packages; Unix; digital simulation; software tools; circuit switching

Other keywords: UNIX-based OPNET package; static measures; simulation; excess traffic; mutual alternative routing model; Telecom Eireann; telephone exchanges; security measures; dynamic measures; network management; system failure; Optimised Network Engineering Tools; grade of service; circuit-switched networks; trunk telephone network; network nodes; transmission links

Subjects: Simulation techniques; Communication network design, planning and routing; Telephony; Programming support; Operating systems; Security aspects; Communications computing; Communication switching