In today's digital age, data centers are the backbone of countless industries, ensuring the exchange of information and maintaining the integrity of critical data. In order to keep these data centers running efficiently, choosing the right cabling solution is critical. Two popular choices in this regard are Direct Attached Copper (DAC) and Active Optical Cable (AOC). We'll delve into the intricacies of these cabling solutions, compare their pros and cons, and help you make an informed decision.
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Energy Consumption
DAC cables typically save more energy than AOC fiber optic cables that require 1-2 watts. Active DAC cables consume less than 1 watt, while passive DAC cables are very energy efficient at less than 0.15 watts due to the thermal design of the directly connected copper cables. As a result, operating costs associated with power consumption can be reduced by choosing a DAC solution.
Transmission Distance
By using fiber optic technology, AOC cables are able to transmit signals over longer distances, up to 100 meters. In contrast, DAC cables have a limited link length, up to about 7 meters for passive DAC cables and 10 meters for active DAC cables. In summary, the DAC cabling solution is suitable for short-distance transmission, while the AOC solution is suitable for scenarios that require
long-distance networking
It is important to note that the maximum distance over which a signal can be transmitted via DAC cable may vary depending on the rate. As the number rate increases, the link length decreases. For example, a 100G DAC cable may only support transmission up to 5 meters.
Cost Considerations.
Broadly speaking
DAC cables have a simpler internal design, fewer components, and copper cables are much cheaper than fiber optic cables. When deployed in a wide range of data centers, a large selection of DAC cables can provide significant cost savings compared to AOC alternatives. DAC provides a cost-effective solution for short-distance use. However, for long distance applications, it is wise to consider the overall cost by making a detailed comparison of the two options.
EMI immunity
Electromagnetic interference (EMI) involves interference caused by external sources that may affect circuitry. As mentioned earlier, active optical cables contain optical fibers, which are dielectric and do not conduct current. Therefore, AOC cables are EMI resistant and can be used in a variety of scenarios. On the other hand, direct-connect copper cables are susceptible to EMI because they use copper to transmit electrical signals. Therefore, the environment in which these cables are used is critical to preventing unwanted interruptions, performance degradation, and even entire system failures.
Bandwidth and Performance
DAC cables offer high bandwidth and performance for short distance connections, making them a cost-effective solution. In contrast, AOC cables utilize fiber optics and offer higher bandwidth, making them ideal for longer distances while remaining resistant to EMI, ensuring reliable performance in a variety of applications.
Flexibility and Length
While DAC cables are rigid and have very limited flexibility due to their copper construction, and are therefore suitable for short to medium length fixed installations, AOC cables offer greater flexibility with their lightweight fiber optics and can cover longer distances, making them suitable for a variety of networking scenarios.
Conclusion
Through the application of different optical cables in the above different scenarios, I believe everyone has a certain understanding of how optical fiber cables can help data centers. Sanopti also provides related solutions, please contact us if you need them.
