Marconi SCP644-M1-JME SFP Transceiver Module

The Marconi SCP644-M1-JME is a hot-pluggable SFP optical transceiver module designed for Gigabit Ethernet and related high-speed applications in Marconi (Ericsson) transmission and networking equipment. It operates at a nominal wavelength of 1310 nm using a Fabry-Perot (FP) laser transmitter and a PIN photodiode receiver. The module supports reliable data transmission up to 10 km over single-mode fiber (ITU-T G.652) and complies with the SFP Multi-Source Agreement (MSA) and SFF-8472 digital diagnostic specifications.This transceiver is optimized for 1.25 Gbps data rate, making it suitable for 1000BASE-LX Gigabit Ethernet links as well as compatible protocols in telecom environments. It features a duplex LC optical connector and is intended for use with single-mode fiber (SMF). The electrical interface consists of a 20-pin SFP connector with differential CML signals. The module operates from a single +3.3 V power supply with low power dissipation, typically below 1 W.

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

Optical performance specifications include average transmitter output power typically in the range of -9 dBm to -3 dBm and receiver sensitivity of -24 dBm or better, providing a sufficient link budget for 10 km reach on single-mode fiber with adequate margin. The design meets IEEE 802.3z requirements for jitter tolerance, extinction ratio, and eye mask compliance. The SCP644-M1-JME is classified as a Class 1 laser product and complies with RoHS and EMC standards.

The transceiver is compatible with Marconi/Ericsson optical transmission platforms, switches, and routers equipped with SFP ports. It is well-suited for metro, access, and enterprise networks requiring stable Gigabit Ethernet connectivity over single-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 from 0°C to +70°C and requires minimal airflow for thermal management. Proper cleaning and inspection of the duplex LC connectors are essential to prevent contamination and maintain optimal link performance.

During operation, the SCP644-M1-JME performs automatic link negotiation and provides calibrated digital diagnostic data for accurate reporting. Recommended fiber patch cables are duplex single-mode LC-to-LC with low insertion loss. The module integrates seamlessly with host management systems through standard SNMP or CLI interfaces for remote monitoring of optical parameters and link status.

This SFP transceiver offers a reliable and standards-compliant solution for deploying or upgrading 1.25 Gbps optical links in Marconi/Ericsson networking environments.