TEL：+86 132 6656 7067 
C-LIGHT 25G/10G Auto Adapting 40km SFP refers to a dual-rate optical transceiver module that supports both 10G and 25G data rates over 40km distances using single-mode fiber.suitable for metro access and long-reach data center interconnects. Auto-negotiates between 10 Gbps and 25 Gbps data rates, enabling seamless deployment in mixed-speed networks.Simplifies network evolution from 10G to 25G without hardware swaps.
-40℃~85℃ 丨 25G/10G Auto Adapting 40km without FEC Support 丨Factory warranty |
CLSFP25GERI |
 ●Supports 25GBASE(25Gb/s) and 10GBASE(10Gb/s);●Lane max bit rate 25.78 Gb/s; ●Up to 40km transmission on SMF, without FEC support by host board; ●Tx 1310nm laser and Rx APD receiver; ●High speed I/O electrical interface (25GAUI); ●I2C interface with integrated Digital Diagnostic monitoring; ●SFP28 MSA package with duplex LC connector; ●Single +3.3V power supply; Maximum power consumption 1.5 W; ●Operating case temperature: Refer to Order info. ●Compliant to IEEE 802.3cc Draft3.0, SFF-8402 and SFF-8432; ●Operate case temperature -40℃~85℃ |
| Specification | |||
| Part Number | CLSFP25GERI | Vendor | C-LIGHT |
| Form Factor | SFP28 | Data Rate | 25.78Gbps |
| Wavelength | 1310nm | Max Cable Distance | 40km |
| Connector | Duplex LC | Media | SMF |
| Transmitter Type | DML 1310nm | Receiver Type | APD |
| TX Power | -0.5~6.5dBm | Receiver Sensitivity | < -18dBm |
| Power Budget | 17.5dB | Receiver Overload | -5dBm |
| Power Consumption | ≤1.5W | Extinction Ratio | 4dB |
| DDM/DOM | Supported | Industrial Temperature | -40 to 85°C |
| CDR | TX & RX Built-in CDR | FEC Function | Support |
| Protocols | SFF-8472, SFF-8432, SFF-8431 | Warranty | 3 Years |
| Core Size | G.652 | Packaging Technology | TO Packaging |
| System Test | ||
 |  |  |
| Test video |
| Related Products | |||
| Part Number | CLSFP25GERI | CLSFP25GZRI | CLSFP25GDW40P-XX |
| Wavelength | 1310nm | 1310nm | C-Band DWDM |
| Connector | LC Duplex | LC Duplex | LC Duplex |
| Distance Max. | 40km | 80km | 40km |
| Data Rate | 25.78Gbps | 25.78Gbps | 25.78Gbps |
| Transmitter Type | DFB | DFB | EML |
| TX Power | > -0.5dBm | > 4.5dBm | > -1dBm |
| Receiver Sensitivity | < -18dBm | < -20dBm | < -15dBm |
| Application | Access Network | Access Network | Data Center |
25G/10G Auto Adapting 40km SFP FAQ
Q1: What is a 25G/10G Auto Adapting 40km SFP transceiver?
A 25G/10G Auto Adapting 40km SFP transceiver is a dual-rate optical module that automatically operates at 10Gbps or 25Gbps over single-mode fiber. It enables flexible network upgrades without replacing optical modules.
Key features include:
10G/25G auto rate adaptation
1310nm DML transmitter
Up to 40km over SMF
Duplex LC connector
SFP28 MSA form factor
It is ideal for metro access, enterprise networks, and 5G transport.
Q2: How does a 25G/10G Auto Adapting SFP work?
The module automatically detects whether the host port operates at 10G or 25G and adjusts accordingly. This allows one transceiver to support mixed-speed networks, simplifying migration while reducing inventory costs.
Q3: What are the key features of the C-LIGHT 25G/10G Auto Adapting 40km SFP?
The C-LIGHT module is designed for flexible long-distance optical transmission.
Key features include:
10G/25G dual-rate support
Up to 40km transmission
1310nm DML laser
APD receiver
DDM/DOM monitoring
Power consumption ≤1.5W
-40°C to +85°C operating temperature
These features provide reliable performance for carrier and enterprise networks.
Q4: What are the advantages of a 25G/10G Auto Adapting transceiver?
Compared with fixed-rate modules, it offers:
One module for two speeds
Lower inventory costs
Easier network upgrades
Excellent compatibility
Long-distance transmission
It is an efficient solution for evolving optical networks.
Q5: Where are 25G/10G Auto Adapting 40km transceivers commonly used?
These modules are widely deployed in medium- and long-distance optical networks.
Typical applications include:
Metro access networks
5G transport
Enterprise backbone networks
Data Center Interconnect (DCI)
Carrier Ethernet
Campus networks
These applications benefit from flexible speed migration and reliable 40km connectivity.
Q6: Why choose a 25G/10G Auto Adapting transceiver instead of a fixed-rate module?
A dual-rate transceiver supports both 10G and 25G networks, reducing hardware replacement during network upgrades.
Its advantages include:
Flexible deployment
Lower operating costs
Reduced spare inventory
Smooth migration to 25G
Better investment protection
It is ideal for mixed-speed network environments.
Q7: How do you choose the right 25G/10G Auto Adapting SFP?
When selecting a dual-rate SFP, consider:
Transmission distance
Required data rate
Fiber type
Switch compatibility
Operating temperature
Power consumption
Choosing the right module ensures reliable network performance and future scalability.
Q8: Why choose the C-LIGHT 25G/10G Auto Adapting 40km SFP?
The C-LIGHT 25G/10G Auto Adapting SFP combines dual-rate flexibility, 40km transmission, and industrial-grade reliability in a compact SFP28 package.
It provides:
Automatic 10G/25G switching
Up to 40km transmission
Low power consumption
DDM monitoring
Broad platform compatibility
It is an ideal solution for metro access, enterprise networks, 5G transport, and data center interconnects.
>
>
>
>
>
>
>
>
