Most networking systems use a transceiver (a combination of both transmitter and receiver) module. This allows for lower overhead costs since they only need to install, operate, and maintain a single device.
Before you invest in a transceiver, you need to understand how they work first, in order for you to make the right choice.
The Transmitter Part
The transmitter part of a transceiver uses electrical input and then converts it into an optical output, either via LED or a laser diode. The light originating from the transmitter pairs up with the fiber through a connector. The fiber optic cable plant then transmits this light at the other end of the fiber, paired with the receiver.
The Receiver Part
The receiver comes with a detector responsible for the conversion of the light into an electrical signal. Lastly, the receiver part of the transceiver conditions the electrical signal properly so that the receiving equipment can use it.
How well the fiber optic data link performs is determined by how the transceiver, particularly the receiver part, works. The receiver should properly and efficiently use the reconverted electrical and match the input correctly to the transmitter.
All manufacturers of transceivers indicate receiver sensitivity for their products. Receiver sensitivity often pertains to the minimum power requirements as well as the minimum power paired with the fiber originating from the source.
It is also important to understand that all datalinks have limitations, primarily due to the link’s power budget. Power budget refers to the difference between the transmitter’s output power and the receiver’s input power.
Where the Cisco SFP+ Modules Come into Play
Cisco has long since had its name established in the information technology and telecommunications industry. It manufactures an expansive array of products for companies with diverse networking requirements.
One of their transceiver product lines is the Cisco 10GBASE SFP+ Modules, which includes the SFP-10G-LRM module, capable of supporting supports link lengths of up to 220m over standard FDDI grade MMF.