Fiber Optic Cable with Optical Transceiver vs DAC/AOC: What are the Distinctions Between Them?

Posted on Dec 8, 2023 by

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In the ever-evolving landscape of networking, the choice between traditional fiber patch cords with transceiver modules connection and the innovative Direct Attach Cables (DAC) and Active Optical Cables (AOC) is pivotal. This article will introduce the applications, advantages and considerations of fiber patch cords with transceiver modules and DAC/AOC, providing insights to help you make informed decisions in designing efficient and resilient networks.

Application

Fiber Optic Cable with Optical Transceiver

Transceiver modules with fiber optic cables are a primary method used to connect ports between network devices, like servers, switches and routers. Its primary function is to establish a connection and facilitate the transmission of signals, enabling smooth data transfer between devices. It provides a flexible solution that allows users to select different types and lengths of patch cords as needed to meet specific network layout and connectivity requirements. Transceiver modules with fiber optic cables connection are often used in data centers, enterprise networks, core and edge networks of telecom carriers, as well as in various lab and test environments.

Fiber Optic Cable with Optical Transceiver

Direct Attach Cable/Active Optical Cable

DAC/AOC cables are crucial components in building high-performance, efficient data transmission due to their high bandwidth, low latency, and compact design. They are often applied to high-rate transmission and high-performance computing in data centers.

Direct Attach Cable/Active Optical Cable

Advantages

Fiber Optic Cable with Optical Transceiver

Flexibility and Customization: Transceiver modules with fiber optic cables offer unparalleled flexibility. With the ability to choose different cable types, lengths, and specifications. As optical fiber is used to connect between optical transceiver modules, optical fiber and optical modules can be connected flexibly through special interfaces (such as SC, LC, MTP/MPO, etc.), which provides a tailored solution for diverse networking setups. This adaptability makes them a preferred choice when dealing with varied connectivity needs.
Suitable for Long Distance Transmission: When transport 10G Ethernet, DAC cables can only transport data for up to 10m while OS2 fiber patch cord can transport data for up to 10km at 1310nm.
Easy Maintenance and Swapping: One notable advantage is the ease of maintenance. If a change in the connection configuration is required or a component needs replacement, it's a straightforward process of swapping out the patch cord without disrupting the entire connection. This simplicity contributes to efficient network management.
Diversity in Application: Transceiver modules with fiber optic cables are versatile and applicable across various network devices. It can meet the specific requirements of different equipment and connectivity standards.

Direct Attach Cable/Active Optical Cable

Energy-saving and Environmentally Friendly: The internal material of DAC is copper core, the natural heat dissipation effect of copper cable is better and it can save energy and protect the environment.
Low Transmission Loss: The integrated structure minimizes transmission losses, maintaining good signal quality.
Space Efficiency: Pre-fabricated design eliminates the need for additional patch cord spacing, making DAC/AOC highly efficient in space-constrained environments.

Considerations

Fiber Optic Cable with Optical Transceiver

Higher Power Consumption: Compared to the DAC cables, transceiver modules have higher power consumption. For example, the power consumption of 100G transceiver modules is above 2W, but the power consumption of 100G DAC cables is generally less than 0.5W.
Complex Deployment: In large-scale deployments, fiber optic cables may require more manual configuration. Besides, fiber cables need patch panels when connected with other devices, making the deployment process relatively complicated.

Direct Attach Cable/Active Optical Cable

Higher Cost: AOC cables have a relatively higher initial cost, especially when customized lengths or specific specifications are needed, potentially increasing the overall cost. When the network needs upgrading, all of the cables need to be replaced, which will cost a lot.
Limited Customization: Compared to patch cords with modules, DAC/AOC cables may have fixed lengths and connection types, limiting customization.
Limited to Short and Medium Transmission Distances: DAC cables are typically suitable for short to medium-distance connections. For transmissions exceeding a certain distance, particularly beyond several meters, alternative solutions like optical fiber may need to be considered.
Environmental Sensitivity: AOC cables may be sensitive to environmental factors, influenced by factors such as bending radius and refractive index. Attention to environmental conditions is necessary during installation. Besides, DAC cables transmit electrical signals that may be affected by the electromagnetic field.

Conclusion

In summary, the choice between fiber transceiver and DAC/AOC cables depends on specific networking needs, considering factors such as flexibility, maintenance ease, space efficiency, application scenarios and budget constraints. By weighing these considerations, you will choose one that can help you build a robust and efficient communication network structure.