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| Mine-used Wire/Wireless Communication |
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Employing digital exchange network, decentralization control by computer, and C language programming, Model KTJ4H Digital Program-controlled Dispatching Communication System has the advantages of advanced technology, pretty appearance, small volume, energy saving, flexibility, high reliability, complete functions, and convenience for maintenance, and is suitable for commanding and dispatching communication for enterprises and public institutions of coal mine and other industries.
The system has complete trunk interfaces and signaling system, can be configured to many kinds of special network or dispatching network wholly digital or digital/analog mixed, convenient for centralized maintenance.
All the circuit boards of the system employs HCMOS integrated circuits and special exchanger chips, and the slots of the circuit boards can be interchanged, convenient for function and capacity configuration.
The system is conformed to the standard issued by Ministry of Posts and Telecommunications in signal, transmission, synchronous mode and charging, and the software of new version according to different requirements also can be provided. |
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Have powerful dispatching functions such as single-key direct calling, transferring, forced cut-in, forced break, conference, hold-on, group call, night service and so on. |
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The system supports large-scale 48-parties conference. |
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The system can set up multiple dispatching desks, which showing number, unit, data of incoming call user in plasma screen in Chinese. |
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Equipped with touch screen, the dispatching desk can realize computerized dispatching. |
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The system provides multi-interfaces for digital trunk £¨2B + D, 30B + D£©, carrier trunk, E/M trunk, loop trunk, etc, can form multi-level special network or dispatching network in digital or digital-analog mode, realize equal-length dialing and is convenient for centralized maintenance. |
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The system supports multi-type terminals including normal automatic telephones, I.S. automatic telephones, surface amplifying device. |
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The system has functions of internal user limitation, multi-level authority and multi-level priority, the high-level user can cut in the low-level user. |
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The system has functions of music hold and validation and computerized operator. |
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The extension telephone has function of giving number and time. |
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The system provides signal standard, transmission standard, synchronization mode and charging feature which conform to the standards issued by the previous ministry of posts and telecommunications, and the new-version software according to the requirements of different communication network also can be provided. |
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The system provides multi-seat dispatching, each seat has main and auxiliary dispatching and can operate at the same time. |
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The system has complete trunk interface and signaling system, and powerful networking function. |
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The system is suitable for connecting with multiple user terminals. |
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All the circuit boards employ HCMOS and special chips of exchange, high integration and less types of components and circuit boards, and each circuit board slot can be exchangeable, very convenient for function and capacity configuration. |
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The system utilizes plug-and-play circuit boards and exchangeable circuit slots, and system board which can be tested without stopping the system, very convenient for maintenance. |
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Capacity:
16 3000 optional (Users: 64, 80, 128, 208, 256, 512, 1024, 2048, each board with 16 users; Trunks: 16, 32, including 2 loop trunks (each board with 16 channels), 4 E/M trunks (each board with 4 channels) and PCM digital trunks (each board with 32 channels, No.1 Signal, with 6 MFC signals) |
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Transmission:
Transmission attenuation from extension to extension or from
trunk to extension: 27dB;
Frequency characteristics of attenuation:
| 300400 Hz |
-0.62 dB |
| 400600 Hz |
-0.61.5 dB |
| 6002400 Hz |
-0.60.7 dB |
| 24003000 Hz |
-0.61.1 dB |
| 30003400 Hz |
-0.632 dB |
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Nonlinear distortion: <0.2 dB(-45+3 dB level) |
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Unbalanced to ground:  40 dB(300600 Hz), 46 dB(6003400 Hz) |
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