We will improve the transmission quality of the metal cable line (4-wire type) used for C-type train radio communication, aiming to stabilize and enhance the reliability of the train radio system.
■□■Features■□■ ■The amplification circuit can compensate for bidirectional (up/down) line loss (up to 20dB in 1dB steps). ■The amplitude correction circuit allows for the correction of amplitude characteristics in both directions (up/down), with settings available in four stages, enabling a maximum correction of +12dB for an amplitude corresponding to a frequency of 3300Hz (equivalent to the press signal frequency) at 1kHz. ■The input and output impedance of the line is compatible with either 600Ω or 370Ω (configurable). ■The device can be powered by AC100V, DC24V, or DC48V. ■For AC100V power supply, rechargeable batteries can be installed (optional). ■The structure is a standard rack 1U unit (height 50mm), so it does not take up much space.
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Our company was founded in 1949 as a designated manufacturer of wire materials for the Ministry of Telecommunications. We have steadily established our presence by designing and manufacturing telephone and communication systems and related equipment for public enterprises such as police, railways, electricity, and broadcasting, alongside the development of related companies. We also have a significant track record in OEM products for major manufacturers. Our main products are custom-made items, which we handle from design to manufacturing, focusing on systems and products related to information and communication. Recent key products include disaster prevention information systems (JR East and JR Hokkaido), command telephone systems (various JR companies, electricity companies, and private broadcasters), remote monitoring and control systems (various JR companies, electricity companies, and telecommunications carriers), and emergency contact systems (private elementary and middle schools). Currently, we are working on the development of the latest IT and IP systems, such as serverless IP conference call systems, to adapt to the evolution of communication networks. If you present us with challenges in niche areas where major manufacturers are not proficient, we are committed to responding with low prices and short delivery times by leveraging the experience we have accumulated over many years and the latest technology. We appreciate your guidance and encouragement.