JSYZ-2000D digital program-controlled machine is a new generation of intelligent scheduling scheduling machine. Not only has one wired and wireless dispatch, administration and scheduling of user functions in one line function, recording function, but also with the various types of switches, scheduling machine tandem network. Not only adapt to the digital communications environment, but also to adapt to simulated communications environment. Main performance specifications fully meet the power industry and the Ministry of Posts and standards YD/T934-1998 DL/T534-93 requirements. The system design is based on reality and the unique innovations in technology, oil, chemical, metallurgy, electric power, coal mines, military, police and military and other large and medium enterprises, private network and the ideal novel Command and Control equipment. JSYZ-2000D uses currently the most advanced fully decentralized control: Each subrack units are designed with CPU hot backup, secondary power supply hot backup, greatly improving the reliability of the system. In addition, a power supply according to user requirements, but also enables hot backup technical features ● CPU board using advanced chip technologies, and configure the ultra large scale integrated chips, high-speed data processing capabilities; ● The modular design can be flexible plug Stubbs expansion, the largest expansion of 10,000; ● trunk interface rich: with E / M, the carrier, PCM (NO.1 or NO.7 signaling), and other standard switching network connection; ● extension automatic fault diagnosis: By scheduling three-color LED keyboard, the status of any identifiable extension; ● meeting scheduling and powerful: using DSP technology, clear sound, set flexible; ● secondary power technology: automatic switching power can be achieved to ensure continuous communication; ● high reliability of: external ports with over current, over-voltage protection function; system of modular structure, flexible expansion; all card board is charged pluggable design; ● support for IP technology: just call the general number, the switch automatically identify whether the number with IP services, and the first to take the economy, the benefits of IP lines ● Anti-lightning circuit performance of the user in full compliance with CCITTK.20 proposed standards, 220V AC access to A, B line, absolutely no damage to the user circuits, relay circuits all have closed-circuit transmission . ● remote maintenance technology: remote user programming, troubleshooting, technical advice and technical training