JDSU 472579A.101 6G OBSAI SFP+

The JDSU 472579A.101 (also known as Nokia FOSH) is a hot-pluggable SFP+ optical transceiver module optimized for 6 Gbps OBSAI (Open Base Station Architecture Initiative) TDM applications in mobile fronthaul networks. It operates at a nominal wavelength of 850 nm using a VCSEL (Vertical Cavity Surface Emitting Laser) transmitter and a PIN photodiode receiver. The module supports high-speed serial links at signaling rates up to approximately 6.144 Gbps or 6.25 Gbps, specifically designed for OBSAI interfaces between baseband units and remote radio heads.This transceiver provides reliable short-reach connectivity up to 300 m over multi-mode fiber (MMF, typically OM3 or OM4). It complies with the SFP+ Multi-Source Agreement (MSA) and relevant OBSAI/TDM specifications for wireless base station fronthaul. The module features a duplex LC optical connector and is intended exclusively for multi-mode fiber applications. The electrical interface uses a 20-pin SFP+ connector with high-speed differential signals. It operates from a single +3.3 V power supply with low power consumption, optimized for high-density deployments.

Digital diagnostic monitoring (DDM/DOM) functions are implemented according to SFF-8472 via the two-wire I2C serial interface. This enables real-time monitoring and reporting of key parameters including transmitted optical power, received optical power, laser bias current, supply voltage, and module temperature. Programmable warning and alarm thresholds support proactive performance monitoring and fault detection. Additional features include transmitter disable (TX_DISABLE) and loss-of-signal (LOS) indication.

Optical performance is tuned for OBSAI TDM requirements, ensuring compliance with jitter tolerance, extinction ratio, and eye mask specifications for fronthaul links. The 472579A.101 is classified as a Class 1 laser product and complies with RoHS and EMC standards. It is engineered for carrier-grade reliability in mobile network environments.

The transceiver is compatible with Nokia (Alcatel-Lucent) AirScale and other base station platforms supporting SFP+ OBSAI ports, as well as compatible third-party equipment. It is ideal for connecting baseband units to remote radio units (RRU) in indoor or outdoor distributed base station architectures over existing multi-mode fiber infrastructure.

Installation is simplified by the hot-pluggable SFP+ form factor, allowing insertion or removal without powering down the host equipment. The module supports commercial operating temperatures (typically 0°C to +70°C) and requires adequate airflow for thermal management in high-density radio equipment. Proper cleaning and inspection of the duplex LC connectors are essential to prevent contamination and maintain optimal link performance.

During operation, the module performs rate adaptation and signal integrity checks required for OBSAI TDM protocols. Recommended fiber patch cables are duplex multi-mode LC-to-LC with OM3 or OM4 fiber for maximum reach up to 300 m. The transceiver integrates with base station management systems for remote monitoring of optical parameters and link status.

This OBSAI SFP+ transceiver offers a reliable, standards-compliant solution for 6G fronthaul connectivity in modern 4G/5G-ready mobile networks with short-reach multi-mode fiber links.