Beijing Letcom’s 16-way telephone optical terminal

Letcom Road Telephone Optical Terminal is a telephone optical transmission equipment that uses optical fiber to transmit long-distance telephone calls. The Lightcom Road Telephone Optical Transceiver adopts a very large scale integrated circuit design with a simple appearance. It has the advantages of easy installation and debugging, maintenance-free, and stable performance. The Lightcom Road Telephone Optical Transceiver is suitable for major communication operators, governments, enterprises and institutions. Letcom Road Telephone Optical Transceiver can directly transmit through optical cables and provide road telephone calls. The networking method is point-to-point, supporting mode. The Letcom Road telephone optical transceiver solves the telephone transmission problem for edge customers. The dedicated digital multiplex chip used in the Letcom Road Telephone optical transceiver is powerful. The Letcom Road Telephone optical transceiver integrates almost all the digital logic functions in the device, thereby significantly improving product performance and reducing costs. The Letcom Road telephone optical transceiver has excellent overall performance, stable and reliable operation, low power consumption, high integration, small size, and easy installation and maintenance. Optical interface parameters Optical wavelength Multi-mode optical port Single-mode optical port receiving dynamic range > Transmission distance Multi-mode kilometers, single-mode kilometers, single-mode kilometers, single-mode kilometers Technical parameters Ringing voltage Ringing frequency Second-line input impedance Ω Off-hook return loss Ringing detection voltage parameters Ringing detection frequency Second-line input impedance Ω Off-hook return loss Working conditions Input voltage – Power consumption ≤ Remarks Voice interface voice channel characteristics comply with the "General Technical Specifications for Telephone Switching Equipment of the Ministry of Posts and Telecommunications" User line loop resistance is less than Ω including Phone feed voltage, feed current, ring current, positive and negative operating voltage range, no polarity requirements or