1. SFP Modules Data Rate
- The speed of the SFP Modules, measured in Gbps (Gigabits per second). Common rates include:
- 1Gbps, 10Gbps, 25Gbps, 40Gbps, 100Gbps.
- The data rate must match the network device and link requirements.
2. Wavelength
- The operating wavelength of the optical signal, measured in nanometers (nm). Common wavelengths include:
- 850nm: For multimode SFP modules, suitable for short-distance transmission.
- 1310nm: For single-mode SFP, suitable for medium-distance transmission.
- 1550nm: For single-mode SFP, suitable for long-distance transmission.
- CWDM/DWDM modules use specific wavelengths (e.g., 1470nm–1610nm) for wavelength-division multiplexing.
3. SFP Modules Transmission Distance
- Indicates the maximum transmission distance the module supports, measured in meters (m) or kilometers (km):
- Short Range (SR): Typically up to 300 meters.
- Intermediate Range (IR): 1–40 kilometers.
- Long Range (LR): Up to 80 kilometers or more.
4. SFP Modules Connector Type
- Common types of optical connectors include:
- LC Connector: Commonly used with single-mode and multimode fibers.
- SC Connector: Often found in earlier optical modules.
- MPO/MTP Connector: Used for high-density connections.
- RJ-45 Connector: Used in copper SFP modules.
5. Fiber Type
- Multimode Fiber (MMF): Used with short wavelengths (850nm) for short-distance transmission.
- Single-mode Fiber (SMF): Used with longer wavelengths (1310nm, 1550nm) for long-distance transmission.
6. Optical Power
- Includes two main parameters:
- Tx Power (Transmit Power): The strength of the optical signal transmitted by the module, measured in dBm.
- Rx Sensitivity (Receiver Sensitivity): The minimum optical signal strength the module can receive, typically expressed as a negative value (e.g., -14dBm).
7. SFP Modules Protocol Compatibility
- Compatible with specific protocols or standards, such as:
- Ethernet (e.g., Gigabit Ethernet, 10GbE)
- SONET/SDH (Synchronous Optical Network/Synchronous Digital Hierarchy)
- Fibre Channel (for storage area networks)
8. Power Consumption
- SFP are designed for low power consumption, typically under 1W. Some high-performance modules may consume more power.
9. Operating Temperature
- Commercial Temperature (C-Temp): 0°C to 70°C.
- Industrial Temperature (I-Temp): -40°C to 85°C, suitable for harsh environments.
10. Digital Diagnostic Monitoring (DDM)
- Modules with DDM support real-time monitoring of parameters, such as:
- Laser bias current
- Temperature
- Supply voltage
- Transmit/receive optical power
11. SFP Modules Type and Compatibility
- Module Types: SFP, SFP+, QSFP, QSFP28 (different generations support various speeds and functions).
- Vendor Compatibility: Some modules are vendor-specific (e.g., Cisco, Huawei, H3C), while others are universal and support multiple brands.
12. Special Features
- Wavelength Division Multiplexing (CWDM/DWDM): Provides multiple wavelengths for increased link capacity.
- Duplex/Simplex: Duplex modules require two fibers (Tx and Rx), while simplex modules use one fiber (with bidirectional wavelength multiplexing).