>Digital Pragrammable Exchanging Machine 

 General

This JSYZ-2000 digital programmable exchanging machine is one new generation of communication system developed by using the advanced numerical communication technology, integrating the advantages of many domestic digital programmable exchanging machine, through Huaguang’s hard works and tackling key problems. The digital programmable exchanging machine, which is strictly in accordance with the requirements of automatic scheduling switchboard accessing network given by the Ministry of Information Industry of P.R.C, adopts the advanced microprocessor as the control core, control method of main processor warm backup running and complete dispersion, as well as the selection use of large-scale TTLand COMS numerical integrate circuit, and make the machine has the advantages of higher stability and reliability. It is widely used for the organs and enterprise including army, railway, highway, bank, irrigation works, electric power, mine, oil, metallurgy, chemical and aviation etc. It can connect 2M/bit or ISDN and Router as telecommunication terminal use, or as special network exchange and connection use. For the machine adopts the full-digital PCM and various peripheral communication interfaces, and has been up to the requirement of comprehensive numerical communication business, e.g., integrated with tone, image and numerical communication, it is the ideal numerical communication equipment in our country at present.

Characters

● Integrated with the subset, terminal and tandem switch and suitable for the connection equipments of communication, unit and the corporation’s public network. 
● Have many kinds of relay interfaces such as Z, S/T, U, E1, E & M etc.
● E1 relay has China NO.1, 7, R2 and ISDN（PRI）signaling.
● Has warm backup host control system with seamless connection, secondary power source and sound source system.
● Various breadboard can have electric plug and socket, and make the daily maintenance works more convenience.
● Humanization speech mailbox can issue various sounds and guide the user according to telephone operation course. 
● Self-troubleshooting system, can online-diagnoses various troubles, and the diagnosis precision is that a certain part. Relay diagnoses guarantee that any relay (ring circuit/2M) can normally work. The scheduling switchboard can switch on or off the peripheral circuit according to the diagnosing result. The extension self-troubleshooting function can distinguish the troubles of turnoff or short of the extension side according to the actual situation. 
● Has the calling recognition function of Caller and ID, calling number display from the in- and out-house lines, compatible of ring circuit relay DTMF and FSK system, calling number display controlled by the signal from E1 relay. 
● Real time control charge-computing system. If the pre-payment is deducted to be zero, the scheduling switchboard will cut the call against the extension or account overspend.
● Has signaling system for infinitude number sender without the difference of first and second dialing, the user can redial the number discretionarily. 
● Has the system of record and message, to do the host and guest message, message recall or calling, as well as special long-time call record.
● Provide two interfaces of attendant desk and dispatching desk. The use of multiple telephone traffic function key-press makes the telephonist do operation easier. The dispatching desk has the functions of in- and out-home line conference call, clustering call, group call, one-key call and lifting call (hot line) etc. 
● Has the functions of IP telephone，IP supermarket (public telephone. IP outgoing can share multiple outgoing way, multiple IP Prefix, single IP Prefix password etc. of the complete machine.
● Has the function of tandem office machine. It can carry out the tandem of interface to interface and ring circuit to ring circuit (e.g. into the ring circuit ---- out the ring circuit).
● Has the functions of multi-PC terminal maintenance and control. The user can carry out the operations through LAN such as terminal maintenance and call fee inquiry etc, or can carry out the long-distance maintenance and call fee inquiry etc through INTERNET. 
● Provide the ring circuit external line multi-number continuous selecting relay. The user can escape the application for continuous selecting input relay line and multi-relay single-number incoming. 
● Has the function of warning station operation treatment.
● Has the convenient and complete call fee administrative software operation system.
Easy to extend the capacity and group the network through the interface.
OFFICE MANAGE FUNCTION：

●　Charge controlled in classification
● Private Trunk Function
●　DDD Function
●　IP Service Function
●　Accounting number & password follow me function
●　Multi-level entitlement dial:
●　Secretary Function
●　Busy call back:
●　Stronger facility function of console
●　Forcing Cut-in/Release
●　Multi extensions use one extension number:
● Dial trunk for user 
●　Call many user one time
●　Virtual telephone exchange
●　Telephone meeting
●　Voice mailbox
●　Trunk packet:
●　Call transferred with user
●　Tone lead up dial number function
● Auto-recording 
: 

HOTEL MANAGE FUNCTION： 
●　Deposit control and multi-interval charging:
●　Accounting number & password follow me function
●　Multi-level entitlement dial
●　Intellective wake-up service
●　Computer on night-duty 
●　DDD Function
●　Don’t Disturb Function
●　Multi computer Manage
●　Trace annoying telephone
●　Flexibility numbering
●　Dividing internal and external call from ringing
●　Call back to central when extension is busy or no answer
●　Inner Call Limited
● Call many user one time
●　Without aperture connection with hotel manage system

Accounting Manage Function：
● Different discount charge rate in different time
● Inner call charge setting
●This system can store 6 months or more call bill according to the hard disk storage，and can not loss call bill when out of power
●Charge rate can be set easily and many ways