Employing digital exchange network, two-stage decentralization
control by computer, Model KTJ4H Digital Program-controlled System
for Dispatching and Communication integrates dispatching and
commanding, computer network and office automation together, and is
suitable for commanding, dispatching and communication for
enterprises and public institutions of coal mine and other
industries. |
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| | 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. | | The system supports large-scale conference up to 48-parties. | | The system can set up multiple dispatching desks, which showing
number and unit name of incoming call on plasma screen and setting
bureau data of the system. | | Equipped with touch screen, the dispatching desk can realize
computerized dispatching. | | The system provides multi-interfaces for digital trunk （2B + D, 30B
+ D）, carrier trunk, E/M trunk and loop trunk, etc., which can form
multi-level special network or dispatching network in digital or
digital-analog mode, realizing equal-length dialing. | | The system is convenient for centralized maintenance with
multi-level special network or dispatching network. | | The system supports multi-type terminals including normal automatic
telephones, I.S. automatic telephones, surface amplifying device. | | The system has functions of internal user limitation, multi-level
authority and multi-level priority, and high-level user can cut in
low-level user. | | The system has functions of music hold and validation, and
computerized operator. | | The extension telephone has functions of giving number and time; | | The signal standard, transmission standard, synchronization mode
and charging feature of the system conform to standards issued by
the Ministry of Posts and Telecommunications, and the system also
can provide new-version software according to requirements of
different communication network. |
| | Capacity:
163000 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) | | Transmission:
Transmission attenuation from extension to extension or fromtrunk
to extension: 27 dB;
Frequency characteristics of attenuation:
| 300400 Hz | -0.62 dB | | 400600 Hz | -0.61.5 dB | | 6002 400 Hz | -0.60.7 dB | | 2 4003 000 Hz | -0.61.1 dB | | 3 0003 400 Hz | -0.632 dB |
| | Nonlinear distortion: -45+3 dB, level<0.2 dB | | Unbalanced to ground: 40 dB(300600 Hz), 46 dB(6003 400 Hz) |
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