The range of a 1 Gigabit (1G) SFP (Small Form-Factor Pluggable) transceiver module can vary depending on the specific type and intended use. Different types of 1G SFP modules are designed for various distances, and they use different optical or electrical signaling methods. Here are some common types of 1G SFP modules and their associated typical ranges:

1. SX (Short-Range) SFP:

• Range: Up to 550 meters (multimode fiber).

• Optical Wavelength: Around 850nm (nanometers).

• Applications: Typically used for short-distance connections within a data center or between devices in the same building.

2. LX (Long-Range) SFP:

• Range: Up to 10 kilometers (single-mode fiber).

• Optical Wavelength: Around 1310nm.

• Applications: Suitable for longer-distance connections, often used for point-to-point links between buildings or across campuses.

3. ZX (Extended Range) SFP:

• Range: Up to 80 kilometers or more (single-mode fiber).

• Optical Wavelength: Around 1550nm.

• Applications: Used for long-distance connections in telecommunications networks or for connecting network equipment in different geographical locations.

4. TX (Copper Twisted Pair) SFP:

• Range: Typically up to 100 meters (over copper twisted pair cables).

• Applications: Used for short-distance connections where fiber optic cabling is not feasible or cost-effective. Commonly used for connections within a rack or between adjacent racks.

It's important to note that the actual achievable range may be influenced by factors such as the quality of the fiber optic cable, the presence of splices or connectors, and the environmental conditions. Additionally, advancements in technology may lead to variations or improvements in the range of specific SFP modules.

Always refer to the product documentation or specifications provided by the SFP module manufacturer or supplier for precise information about the range and compatibility of a particular SFP module.