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11th Floor, Chuangbo Industrial Park, 177 Tianchen Road, High-tech Zone, Jinan City, Shandong Province, China
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Our 4-Channel FXS/FXO Telephone Optical Transceiver (model: OTS-4T) is a high-performance, fully digital fiber transmission device purpose-built to deliver secure, interference-free analog voice communication over a single optical fiber. Leveraging advanced PCM technology, this industry-leading telephone optical transceiver transmits up to 4 independent analog telephone channels (FXS/FXO) with exceptional stability, bridging traditional voice services with modern fiber optic infrastructure. Designed for business customers, telecom operators, system integrators, and mission-critical network operators, this compact analog voice over fiber device delivers a cost-effective, reliable solution for long-distance voice transmission across diverse operating environments.
Built on a fully digital architecture and industry-standard PCM technology, our FXS/FXO fiber mux eliminates electromagnetic interference and signal degradation common in copper-based transmission, ensuring consistent performance even over extended distances. Dual redundant power supplies minimize downtime for critical communication systems.
Compliant with ITU-T G.711 voice encoding standards, the OTS-4T Telephone Optical Transceiver delivers 64Kbps per-channel transmission with minimal delay and distortion, providing crystal-clear, high-fidelity voice communication for professional scenarios.
Compatible with FXS, FXO, magnet, and hotline interfaces via standard RJ11 connectors, the device adapts to diverse voice requirements. Its compact form factor supports desktop, rack-mount, and wall-mounted installation, fitting seamlessly into telecom rooms, industrial cabinets, and remote field sites.
Using single-mode fiber, the long-distance voice fiber transmission device supports configurable distances of 20km, 40km, and up to 80km with matched optical modules, catering to cross-regional and remote-area voice access needs.
Parameter Category | Core Specifications |
Optical Interface | Connector: FC / SC / ST (optional); Wavelength: 1310nm / 1550nm; Transmission Distance: 20km / 40km / 80km (optional); Receiving Sensitivity: ≤ -26dBm |
Telephone Interface | Channels: 4 FXS/FXO; Impedance: FXO 200Ω + 680Ω |
Voice Encoding | Standard: ITU-T G.711; Rate: 64Kbps per channel; Signaling: 16-slot CAS signaling |
Power Supply | Input: AC 220V (165V~265V) / DC -48V (-36V-72V); Power Consumption: <15W |
Environmental Parameters | Operating Temperature: -10°C ~ +50°C; Humidity: ≤95% (non-condensing) |
Telecom & FTTx Voice Access: Ideal for telecom operators delivering FTTH/FTTx voice services, extending telephone lines over fiber to urban and remote business/residential users.
Enterprise Private Voice Networks: Provides secure, cost-effective interconnection for multi-site enterprise private networks, with zero voice quality loss between branches and headquarters.
Government & Mission-Critical Communications: Delivers interference-resistant, reliable voice transmission for government and military secure networks, meeting strict confidentiality and stability requirements.
Critical Infrastructure & Industrial Systems: Offers stable voice channels for power grid, transportation, and utility operations, adapting to harsh industrial environments for uninterrupted critical facility communication.
We offer comprehensive customization and OEM services for our 4-Channel FXS/FXO Telephone Optical Transceiver to meet the unique needs of industry partners and system integrators. Available customizations include optical connector type selection, transmission distance module configuration, power supply tailoring, custom branding/labeling, and packaging design. We also provide firmware adjustments and functional tweaks for specific industrial applications, with flexible MOQ options for bulk OEM orders.
With matched single-mode fiber and optical modules, the device supports a maximum transmission distance of up to 80km, with 20km and 40km configurable options for shorter deployments.
The OTS-4T is compatible with FXS, FXO, magnet, and hotline interfaces, with 4 independent RJ11 ports supporting up to 4 analog voice channels.
Yes, it operates reliably in -10°C ~ +50°C temperatures, with non-condensing humidity tolerance up to 95%, fit for industrial and field deployment.
The device supports dual redundant inputs: AC 220V (165V265V) and DC -48V (-36V-72V), ensuring high reliability for mission-critical systems.
With decades of expertise in global telecom and optical communication innovation, EASTCOM is a trusted partner for enterprise and industrial network operators worldwide. Our 4-Channel FXS/FXO Telephone Optical Transceiver is manufactured under strict ISO 9001 quality control, fully compliant with ITU-T international standards, and backed by end-to-end technical support and after-sales service. We offer flexible bulk supply, customized solution development, and long-term partnership support, helping business customers reduce deployment costs, improve network reliability, and future-proof their voice communication infrastructure.
