Cisco SFP-10G-BX40D Compatible 10GBASE-BX40-D BiDi SFP+ 1330nm-TX/1270nm-RX 40km DOM Simplex LC SMF Transceiver Module

Overview

Optimize your fiber infrastructure with the Cisco SFP-10G-BX40D Compatible transceiver. This Bidirectional (BiDi) SFP+ module allows you to transmit and receive 10 Gigabit Ethernet data simultaneously over a single strand of Single-Mode Fiber (SMF), effectively doubling your fiber capacity without laying new cabling.

The SFP-10G-BX40D operates by transmitting data at the 1330nm wavelength and receiving data at 1270nm. It is engineered to work seamlessly as a pair with the SFP-10G-BX40U. With a reach of up to 40 kilometers, this module is an excellent solution for metropolitan area networks (MANs) and campus interlinks where fiber availability is limited or leasing costs are high.

Key Features

• Bidirectional Technology: Uses WDM (Wavelength Division Multiplexing) to carry Tx and Rx signals on one fiber strand.
• Wavelength Configuration: Transmits at 1330nm / Receives at 1270nm.
• Long Distance Reach: Supports links up to 40km on standard 9/125µm SMF.
• Connector Type: Simplex LC connector (only one fiber required).
• Digital Diagnostics: Full DDM/DOM support for monitoring real-time optical performance.
• Compatibility: Fully compliant with SFP+ MSA and IEEE 802.3ae 10GBASE-ER/BX standards.

Applications

The SFP-10G-BX40D is primarily used in environments where fiber strands are scarce. Common use cases include:

• Fiber Exhaust Relief: Doubling the capacity of existing fiber plants by converting dual-fiber (duplex) links into two separate single-fiber (simplex) links.
• Telecom Backhaul: Connecting cell towers or remote aggregation nodes to the core network up to 40km away.
• Enterprise Campus: Linking buildings that only have a single strand of dark fiber available between them.

Specifications

Cross-Platform Compatibility

Our 10GBASE-BX40D modules are coded to function identically to OEM parts from major manufacturers. Below is a list of common equivalents. Note: Because this module is part of a pair, ensure you are matching the “D” (Downstream/1330nm) side with the correct “U” (Upstream/1270nm) side from your equipment vendor.

Advantages

The primary advantage of the SFP-10G-BX40D is cost-efficiency regarding fiber cabling. Laying new fiber is incredibly expensive; using BiDi optics allows you to instantly utilize reserve capacity in your current infrastructure. Furthermore, our compatible modules offer this capability at a fraction of the price of OEM transceivers, all while maintaining strict adherence to MSA standards and offering a Lifetime Warranty.

FAQ (Technical & Product Questions)

1. What module must I pair with the SFP-10G-BX40D?

You must pair this module with the SFP-10G-BX40U. The “D” module transmits at 1330nm and receives at 1270nm, while the “U” module does the exact opposite (Tx 1270nm / Rx 1330nm). Two “D” modules connected together will not work.

2. Can I use this module for distances shorter than 40km?

Yes, but caution is advised. 40km optics have higher transmit power. If you are connecting a link shorter than 10km, you should use a 5dB optical attenuator to prevent “blinding” or damaging the receiver with a signal that is too hot.

3. Does this require a special patch cable?

It requires a Simplex Single-Mode patch cable with an LC connector. “Simplex” means a single strand. Most standard yellow OS2 fiber patch cables can be peeled apart to be used as simplex cables.

4. Is the connector APC or UPC?

The SFP interface is UPC (Ultra Physical Contact), which corresponds to the standard Blue LC connector. Do not plug a Green (APC) connector directly into the transceiver.

5. What is the difference between BX40 and BX10?

The difference is distance and optical power. BX10 is designed for 10km, whereas BX40 is designed for 40km. BX40 modules have more powerful lasers and more sensitive receivers to overcome the higher attenuation found in longer cable runs.