5G Fronthaul Semi-Active WDM System，5G Fronthaul Semi-Active WDM System CWDM 18CH MWDM 12CH CPRI eCPRI 10G 25G Optical Multiplexing for Mobile Communication

The 5G Fronthaul Semi-Active WDM System is designed for fiber-efficient transmission between central-office equipment and remote radio sites in 4G/5G mobile fronthaul networks.

The system combines active monitoring and management functions at the central-office side with passive WDM deployment at the remote side. By transmitting multiple CPRI, eCPRI, Ethernet, and other supported services over different optical wavelengths on shared fiber infrastructure, it helps reduce fiber consumption while maintaining transparent service transmission.

• CPRI and eCPRI Fronthaul Support
  Supports CPRI 1–10 and eCPRI 10G/25G interfaces for mobile fronthaul transmission.

• Multi-Service Transparent Transport
  Compatible with STM-1/4/16/64, GE, 10GE, 25GE, and other supported service interfaces.

• CWDM and MWDM Options
  Supports up to 18 CWDM wavelengths and 12 MWDM wavelengths for different fiber and optical power budget requirements.

• Fiber-Saving WDM Architecture
  Multiple wavelength channels share common fiber infrastructure, helping reduce the number of fibers required between central and remote sites.

• Modular Aggregation Configuration
  Supports 1:6, 1:12, and 1:18 configurations for different fronthaul deployment requirements.

• 1:1 Optical-Layer Protection
  Supports optical-layer 1:1 protection with a specified switching time of less than 50 ms.

• Graphical Network Management
  Provides a graphical management interface for centralized monitoring of optical modules, links, and equipment status.

• Optical Module Monitoring
  Supports monitoring of relevant optical module and line-status information to assist operation and maintenance.

• Flexible Central-Office Power Supply
  Central-office equipment supports AC 220 V and DC −48 V power supply options.

• 1+1 Power Input Protection
  Supports redundant power input configuration for improved central-office equipment availability.

• Passive Remote-Side Deployment
  The remote WDM unit uses a passive architecture, reducing the requirement for powered equipment at the radio site.

• Outdoor Deployment Option
  The remote passive WDM unit can be configured for outdoor deployment according to the corresponding mechanical and environmental specification.

• 5G mobile fronthaul

• 4G/5G network evolution

• CPRI and eCPRI transport

• DU/BBU to AAU/RRU connectivity

• Mobile base station fiber expansion

• Fiber-constrained fronthaul networks

• CWDM-based mobile fronthaul

• MWDM-based mobile fronthaul

• Multi-service fronthaul transport

• Centralized RAN and distributed RAN architectures

A semi-active WDM system combines active monitoring and management functions with passive wavelength multiplexing elements. In a typical fronthaul deployment, active equipment is installed at the central-office side while a passive WDM unit is deployed at the remote radio site.

Its main advantage is fiber saving combined with centralized monitoring. Multiple fronthaul services can be carried over different wavelengths on shared fiber infrastructure without requiring fully active transmission equipment at both ends.

The system supports CPRI 1–10 and eCPRI 10G/25G according to the specified configuration.

Yes. It is also compatible with STM-1/4/16/64, GE, 10GE, and 25GE services, allowing multiple service types to be transported through the same platform.

CWDM uses a wider wavelength spacing and can support up to 18 wavelength channels in the specified system, while MWDM provides a 12-wavelength option. The appropriate configuration depends on fiber resources, optical power budget, transceiver availability, and network architecture.

They represent available modular aggregation configurations of the system. The exact relationship between service ports, wavelength channels, and optical paths should be confirmed according to the selected hardware configuration.

Yes. The specified system supports 1:1 optical-layer protection with a protection switching time of less than 50 ms.

The graphical network management platform can be used to monitor supported optical module information, line status, and equipment operating status, helping operators perform centralized network operation and maintenance.

The remote WDM unit uses a passive architecture and therefore does not require an electrical power supply for wavelength multiplexing and demultiplexing.

If the specific system architecture uses a passive transparent optical path independent of the monitoring electronics, service traffic can remain optically transparent even if the management section loses power. This behavior should be confirmed against the actual hardware architecture before being stated as a guaranteed specification.

Yes, an outdoor deployment configuration is available. The required operating temperature, protection rating, enclosure type, and installation method should be confirmed according to the selected model.

Important parameters include service interface type, CPRI/eCPRI rate, channel quantity, CWDM or MWDM wavelength plan, aggregation configuration, optical module type, transmission distance, optical power budget, protection architecture, switching time, network management functions, AC/DC power configuration, remote-unit enclosure, operating temperature, and installation method.