What Is an Optical Module
On an optical network, a sender needs to convert electrical signals into optical signals before sending them to a receiver, and the receiver needs to convert received optical signals into electrical signals. An optical module is a component that completes electrical/optical conversion on an optical network. Figure 9-2 shows the structure of an optical module.
1. Handle |
2. Receiver |
3. Transmitter |
4. Shell |
5. Label |
6. Dust plug |
7. Spring |
8. Connector |
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Figure 9-3 shows an SFP/eSFP optical module.
Figure 9-4 shows the appearance of an SFP+ optical module.
Figure 9-5 shows the appearance of an SFP28 optical module.
The side with an L-shaped notch close to the connector is the top of a QSFP+ optical module, as shown in Figure 9-6. When connecting a QSFP+ optical module to a port, keep the top side upward. Do not insert the QSFP+ optical module upside down.
Currently, there is no formal standard for 40G Ethernet. Therefore, a device may not display complete diagnostic information about 40GE optical modules. This is an acceptable fact in the telecommunications industry and does not affect functions of 40GE optical modules.
