Application of Raytrans ultra-far chain network optical terminal machine in tunnel construction

In the process of tunnel excavation construction, telephone, voice intercom, voice broadcast and other stations need to be arranged along the way, and the radio intercom distance has been greatly limited, and more relay stations must be deployed along the way if needed.
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Along the way the use of dual optical port of the industrial grade optoelectronic machine NTD421, each station can provide two phones, the center to access the telephone switch. The application is shown in Figure 1.

Generally, video surveillance along the way, and stress detection, risk control system, lighting control, etc., can also be included in the same communication system (but the actual application of these communication systems will use another set of communication equipment, generally using dual optical transceiver, plus serial port server, plus POE power supply.)
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IDM POE-M08+=3 gigabit optical transceivers +3 gigabit Ethernet switches with 8 gigabit ports +4 serial port servers +150W 8-port POE power supply). Figure 2

The following problems exist in these schemes:
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1) Using an ordinary telephone switch, when two users make a call, other users have emergency services, can not be forcibly removed, forced to insert priority calls.
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2) The use of an independent telephone switch cannot connect audio intercom terminals, broadcast terminals, wireless intercom, etc., which is not conducive to the integration of various communication means.
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3) The use of telephone exchange, can not achieve teleconference, telephone broadcast and other functions.
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4) and image communication belong to different communication systems, communication equipment, power interface, optical fiber interface, messy installation, complex maintenance, etc.
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Ruiguang Extreme Remote provides excellent performance, integrated central and remote solutions, the central end provides an integrated audio and video scheduling switch with dual gigabit optical ports IDM OMP2000-4E1-60, the remote use of IDM GTD442 can provide two physically isolated line-speed Gigabit Ethernet (usually one for video surveillance, The other is used for measurement data transmission, control data transmission, etc.) The four audio channels are used to provide telephone interface, intercom interface, amplification broadcast interface, wireless intercom forwarding interface, and so on. There are also two RS485 ports, which can be aggregated to the serial port server disk in the center and converted into an Ethernet port to connect to the data server.