- Fiber Optic Transceiver Module
- High Speed Cable
- Fiber Optical Cable
- Fiber Optical Patch Cords
- Splitter CWDM DWDM
- PON Solution
- FTTH Box ODF Closure
- PCI-E Network Card
- Network Cables
- Fiber Optical Adapter
- Fiber Optical Attenuator
- Fiber Media Converter
- PDH Multiplexers
- Protocol Converter
- Digital Video Multiplexer
- Fiber Optical Tools
- Compatible
40GBASE-CSR4 QSFP+ Transceiver
40GBASE-CSR4 QSFP+ transceiver modules extend the transmission distance of 40GBASE-SR4, supporting link length of 300m on OM3 MMF and 400m on OM4 MMF. Sopto’s SPT-QSFP+-CSR4 transceiver modules can be used for native 40G optical links over 12-fiber ribbon cables with MPO/MTP connectors, or in 4x10G mode with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. Each 10-gigabit lane of this module is compliant to IEEE 10GBASE-SR specifications.
Tips: SOPTO supplies (Original Equipment Manufacture) OEM Service and Third-Party Compatible Fiber Optic Transceivers.
Compatible Brands
Cisco
Juniper
HP
Intel
DELL
Other mainstream brands
40G BASE-CSR4 QSFP+ Order information
Part No. | Parameters | Laser | Temperature | Get Price | |
SOPTO 40G BASE-CSR4 QSFP+ Transceiver | |||||
SPT-QSFP+-CSR4 | QSFP+ CSR4 40G 400m Multimode Mode Fiber (MMF) 850nm MPO | Standard: 0~70°C |
40G BASE-CSR4 QSFP+ Features
Hot Pluggable QSFP form factor
Support for 40GBASE Ethernet
4-lanes, 850nm wavelength
Up to 300m on OM3 and 400m on OM4 MMF
VCSEL array transmitter and PIN array receiver
Interoperable with other IEEE-compliant 40GBASE interfaces available in various form factors
Industry-standard MPO connector
Digital Optical Monitoring (DOM)
Single 3.3V Power Supply
Power dissipation < 1.5W
Operating case temperature: 0 to 70℃

40G BASE-CSR4 QSFP+ Application
10GBASE-SR applications
40GBASE-SR4 applications
Dotcom/Telecom switch & router connections
Data Aggregation and Backplane Applications
Proprietary Protocol and Density Applications
Server-Server Clusters, Super-computing interconnections
Interconnects rack-to-rack, shelf-to-shelf, board-to-board, board-to-optical backplane
InfiniBand SDR, DDR and QDR applications
Superiority
- low price
- 1-3 Years Warranty
- Standarized Design
- High-quality raw materials
- A Wide range of selection and large stock
- Rigorous and comprehensive product testing
- Widely compatible with all brand equipment

The SFP transceiver is not standardized by any official standards body, but rather is specified by a multi-source agreement (MSA) among competing manufacturers.
As a practical matter, some networking equipment manufacturers engage in vendor lock-in practices whereby they deliberately break compatibility with "generic" SFPs by adding a check in the device's firmware that will enable only the vendor's own modules.
For example, in 2003 during a routine Internet Operating System (IOS) update on their Catalyst line of switches, Cisco added a feature that would cause the switch to reject optical modules that were not deemed ‘Cisco brand.
Sopto is a professional manufacture and supplier of fiber optic transceivers. All our optical transceivers are tested strictly before delivery and fully compatible with major bands’ equipment.
Sopto provides GBIC, SFP, SFP+, X2, XENPAK, XFP and QSFP+ transceivers, supporting different data rate such as 1G, 2G, 4G, 8G, 10G, 40G, etc. These transceivers can be operated with network switches, routers, firewalls, digital return transceivers and other devices of all leading vendors, such as Cisco, HP, Juniper, H3C, 3COM, D-link, etc.
As a third party vendor, Sopto can supply transceiver modules with good quality and low price for our customers.























Fiber Optic Transceiver Customized Example-OEM
What is OEM?
OEM stands for Original Equipment Manufacturer, refers to companies that make products for others to repackage and sell. OEMs are manufactures who resell another company’s products under their own name and branding.
Sopto Provides OEM Service
Sopto can provide OEM service for our customers. All our optical transceivers are produced by our own factory and 100% compatible with Cisco, HP and other brands’ devices. We also provide customize optical transceivers to fit your specific requirements with high quality and low price. If you need OEM service, please give priority to our products. For more information, please contact our sales staff on-line by e-mail or live-chat. Please call us at 0086-755-23018340 or email to sales@sopto.com
Customized Example | ||||
Logo | Model | SN Code | Compatible Brand | Package |
![]() | SPT-XXXX-XX | SPXXXXXXXXX | CISCO | Package with logo |
Sopto provides customized service. Tell us your requirement on logo,model,SN code,compatible brand and package. |