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| Form Factor | Part No. | Fiber Type | Data Rate | Wavelength | Distance | Connector | Case Temperature | Note |
OSFP | CLOSFP800GLP | Loopback | 800G | - | - | Com./Ind. | ||
QSFPDD | CLQSFPDD800GLP | Loopback | 800G | - | - | Com./Ind. | ||
| QSFPDD | CLQSFPDD400GLP | Loopback | 400G | - | - | Com./Ind. | ||
| QSFP112 | CLQSFP400GLP | Loopback | 400G | - | - | Com./Ind. | ||
| QSFP56 | CLQSFP200GLP | Loopback | 200G | - | - | Com./Ind. | ||
| QSFP28 | CLQSFP100GLP | Loopback | 100G | - | - | Com./Ind. | ||
| QSFP+ | CLQSFP40GLP | Loopback | 40G | - | - | Com./Ind. | ||
| SFP28 | CLSFP25GLP | Loopback | 25G | - | - | Com./Ind. | ||
| SFP+ | CLSFP10GLP | Loopback | 10G | - | - | Com./Ind. |
C-LIGHT optical loopback modules are designed for network equipment testing, port diagnostics, signal verification, and troubleshooting. By redirecting the transmitted optical or electrical signal back toward the receiving interface, a loopback provides a controlled connection for evaluating the behavior of network ports and associated equipment.
The C-LIGHT Loopback family covers a broad range of network speeds from 10G to 800G. Available configurations include OSFP, QSFP-DD, QSFP112, QSFP56, QSFP28, QSFP+, SFP28, and SFP+ form factors, allowing the loopback solution to match different generations of optical networking hardware.
Loopback modules can be used during equipment development, production testing, installation, maintenance, and fault diagnosis. They provide a convenient way to create a repeatable test path without requiring a complete optical link between two independent network devices.
With multiple form factors and data-rate options, C-LIGHT loopbacks are suitable for testing modern data center equipment as well as established 10G, 16G, 25G, and 40G networking platforms.
The Loopback family covers network speeds from 10G through 800G, supporting a wide range of testing environments.
Configurations are available for OSFP, QSFP-DD, QSFP112, QSFP56, QSFP28, QSFP+, SFP28, and SFP+ interfaces.
Loopback modules provide a controlled return path for evaluating the transmit and receive behavior of compatible network ports.
The modules can assist engineers in isolating port and connectivity issues during network troubleshooting.
A dedicated loopback provides a consistent test connection for equipment validation and maintenance procedures.
The product family includes solutions for current 800G, 400G, 200G, and 100G platforms as well as lower-speed interfaces.
C-LIGHT lists commercial and industrial temperature options for the supported loopback configurations.
The module-style form factor allows the loopback to be inserted directly into compatible network equipment ports during testing.
Loopbacks can be used to validate compatible switch, router, server, and other network equipment interfaces during development and production testing.
Engineers can use loopback modules to check individual high-speed ports when investigating connectivity or interface-related issues.
Loopback configurations can provide a controlled return connection for evaluating compatible optical transceiver ports and network interfaces.
Production environments can use standardized loopback connections as part of equipment and interface validation procedures.
Loopback modules can support commissioning and port verification before a complete network link is placed into service.
A loopback can help technicians determine whether a suspected issue is associated with a network port or an external connection.
800G, 400G, 200G, and 100G loopback configurations support testing requirements for modern high-bandwidth data center platforms.
10G, 16G, 25G, and 40G loopback options provide testing support for established network equipment and infrastructure.
The product range covers multiple generations of network interfaces, making it easier to standardize testing resources across different equipment platforms.
Different module packages allow customers to select a loopback according to the physical interface of the equipment being tested.
Support for interfaces up to 800G makes the family suitable for testing current-generation high-bandwidth data center equipment.
C-LIGHT states that its products undergo initial testing, final testing, and factory inspection as part of its quality-control process.
Commercial and industrial temperature configurations are available within the listed Loopback product range.
The plug-in module format provides a convenient way to establish a test connection without constructing a separate optical network path.
C-LIGHT provides personalized product customization services for customers with specific application and equipment requirements.
C-LIGHT provides professional technical guidance, compatibility support, and pre-sales and after-sales service for network applications.
Available in OSFP and QSFP-DD configurations for high-speed 800G equipment testing.
Available in QSFP-DD and QSFP112 form factors for different 400G network platforms.
QSFP56-based 200G loopback configuration for compatible high-speed network equipment.
QSFP28-based 100G loopback designed for testing compatible 100G network interfaces.
QSFP+-based solution for 40G equipment and network interface diagnostics.
SFP28-based configuration for 25G network testing and port verification.
SFP+-based 16G option for compatible high-speed network testing environments.
SFP+-based 10G configuration for established Ethernet and network equipment testing applications.
An optical loopback module is a test accessory that returns a transmitted signal toward the receiving interface, creating a controlled loopback path for equipment and port testing.
The current C-LIGHT Loopback range includes 800G, 400G, 200G, 100G, 40G, 25G, 16G, and 10G configurations.
The listed product range includes OSFP, QSFP-DD, QSFP112, QSFP56, QSFP28, QSFP+, SFP28, and SFP+ form factors.
It can be used for equipment testing, port verification, network diagnostics, fault isolation, installation checks, and maintenance activities.
Yes. C-LIGHT provides 100G, 200G, 400G, and 800G loopback configurations intended for high-speed network equipment and data center testing environments.
Yes. C-LIGHT lists commercial and industrial temperature options for the supported Loopback products.
Yes. C-LIGHT provides customized product services according to customer requirements and different equipment applications.
Yes. C-LIGHT provides technical guidance, compatibility support, product documentation, and pre-sales and after-sales service.
C-LIGHT optical loopback modules provide a practical testing and diagnostic solution for network equipment ranging from established 10G platforms to modern 800G data center systems. With OSFP, QSFP-DD, QSFP112, QSFP56, QSFP28, QSFP+, SFP28, and SFP+ options, the product family can match a wide range of network interfaces. Whether used for production testing, port verification, troubleshooting, installation, or maintenance, C-LIGHT Loopback provides a convenient and repeatable method for establishing controlled test connections.
Contact Us●100% of products pass initial test, final test and factory inspection.
●3-step quality control management process.
●100% complete implementation of customer order quality requirements.
●100% guarantee of customer product data information security.
Please contact us to download the certification certificate.
Please Note: Installing a third party transceiver does not void your network equipment warranty. Network equipment manufacturers all have guidelines stating that warranty support on their products will not be affected.
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