Our 1.25G SFP BIDI 40km series provides a fiber-efficient, high-performance solution for establishing Gigabit Ethernet and Fibre Channel links over extended distances. This series specifically addresses the challenge of limited fiber infrastructure by enabling full-duplex 1.25Gb/s bidirectional communication over a single strand of standard single-mode fiber for reaches up to 40 kilometers. The series comprises two dedicated, matched transmitter/receiver pairs, offering flexibility for network design:

Pair Set A: 1.25G SFP BIDI 1550T/1310R 40km & 1310T/1550R 40km
Pair Set B: 1.25G SFP BIDI 1550T/1490R 40km & 1490T/1550R 40km

All modules in the series share core features: a hot-pluggable SFP form factor, integrated digital diagnostic monitoring (DDM) for real-time link management, robust EMI/ESD protection, and availability in multiple operating temperature grades (Commercial, Extended, Industrial) to suit diverse deployment environments from controlled data centers to harsh outdoor cabinets.

Pair Set A: 1550nm/1310nm Wavelength Combination

This matched pair utilizes the industry-standard 1550nm and 1310nm wavelength combination. The 1550T/1310R module transmits at 1550nm and receives at 1310nm, while its counterpart, the 1310T/1550R, performs the inverse operation. This pairing is a proven, reliable choice for general-purpose long-haul applications. It is ideally suited for 1000BASE-EX Ethernet compliant links, metropolitan area network (MAN) extensions, and long-distance storage area network (SAN) connections via 1x Fibre Channel.

Pair Set B: 1550nm/1490nm Wavelength Combination

Pair Set B employs a 1550nm and 1490nm wavelength scheme. The 1550T/1490R module transmits at 1550nm, and the 1490T/1550R transmits at 1490nm. This alternative wavelength plan offers network planners additional flexibility, particularly useful in dense wavelength division multiplexing (DWDM) access scenarios or in networks where the 1310nm window may be occupied by other services. It provides the same robust 40km performance for metro/access networks and high-availability optical links, ensuring a versatile solution for complex fiber plant environments.

By offering two distinct wavelength-paired sets within a unified platform, our 1.25G SFP BIDI 40km series delivers unmatched deployment versatility, allowing you to maximize existing fiber assets and future-proof your network expansion with reliable, single-fiber technology.

FAQ

Q1: The module is rated for 40km. My actual link is only 15km. Will using it this way damage the module?

A1: No, it will not cause damage. Using a longer-reach module for a shorter distance is safe and actually provides ample "optical power margin," making the link more robust. However, please do not neglect fundamental practices like fiber cleaning just because the distance is shorter.

Q2: What warranty and support do you offer?

A2: We provide a standard limited warranty. Please refer to our official warranty policy for detailed terms. Our technical support team is available to assist with installation and troubleshooting.

Q3: Do I need to configure anything special for it to work?

A3: Usually, no. It is a plug-and-play device for most modern switches that support 1.25G SFP interfaces.

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