Brocade 40G-QSFP-4SFP-AOC-1001 Compatible 40G QSFP+ to 4x10G SFP+ AOC is popular in the market. Why you choose Brocade 40G-QSFP-4SFP-AOC-1001 Compatible 40G QSFP+ to 4x10G SFP+ Breakout AOC? Follow here:

AOC VS DAC
The AOC cable is a wiring technology that accepts the same electrical input as a traditional copper cable, but uses fiber between the "connectors." It uses electro-optic conversion at the end of the cable to improve cable transmission speed and distance performance without sacrificing compatibility with standard electrical interfaces. AOC cables are ideal for short-range multi-channel data communication and interconnect applications. 
Direct Attach Cable (DAC) refers to direct connection cable or direct connection copper cable. Optical modules are installed at both ends of the high-speed jumper. By connecting the switch to a router or server, it is widely used in storage area networks, data centers, and high-performance computer connections, and is gradually emerging in network communication.

Advantages of AOC:
1. The weight of AOC is about 25% of DAC, and the diameter of cable is smaller. The minimum bending radius of cable is only 30 mm, which is much better than DAC.
2. Due to the nature of electrical signals, electromagnetic interference (EMI) limits the performance and overall reliability of copper.
3. AOC uses the same current input wiring technology as traditional copper cables, but uses optical fibers between "connectors" and has electro-optic conversion at the end of the cable, which can improve speed and distance for connecting cables without sacrificing compatibility with traditional electrical interfaces.
4. The BER of AOC is 10-1, while that of DAC is 10-12. Statistically, this assumes that AOC produces less than one error per day, while copper cables produce a little error every 1 or 2 minutes.
5. For SFP + and QSFP + versions, AOC ranges up to 20 meters, while DAC ranges slightly more than 5 meters, up to 10G.

Why choose Brocade 40G-QSFP-4SFP-AOC-1001 Compatible 40G QSFP+ to 4x10G SFP+  AOC?
Brocade 40G-QSFP-4SFP-AOC-1001 Compatible 40G QSFP+ to 4x10G SFP+  AOC with four parallel channels of QSFP + ports converted to four SFP + ports, each channel can work at 10 Gbps speed, communication distance can reach 100 meters. Active Optical Fiber Cable from QSFP + to SFP + has no optical junction and provides end-to-end connection, rather than multi-mode fiber being insensitive to bending. Therefore, compared with traditional solutions, the number of connections is reduced by half, which improves reliability and reduces optical attenuation, delay and consumption. At the same time, the cost is reduced. Each parallel channel is synchronized to provide interoperability between 40 GbE and 10 GbE interfaces, thus speeding up the installation process by limiting the time spent on debugging and tuning.

Brocade 40G-QSFP-4SFP-AOC-1001 Compatible 40G QSFP+ to 4x10G SFP+ AOC Solution
40G QSFP+AOC is an efficient integrated product for short distance (< 100m) multi-channel data communication and interconnection applications. If the transmission distance is more than 100 meters, DAC cable and AOC cable are generally not recommended. Usually applied to the following two schemes.
Scheme 1: Distance less than 5 meters
If the transmission distance is less than 5 meters, it's like two switch ports are connected in the same rack or between racks in the same room. QSFP + passive DAC cable is recommended.
Scheme 2: Distance less than 100 meters (< 5 meters)
QSFP + AOC cable is the ideal choice for transmission distance less than 100 meters but more than 5 meters. Due to the performance limitation of QSFP + passive DAC cable, it can not meet such a long requirement. Although 40GBASE-SR4 QSFP + optical devices can also be achieved, the cost of MTP trunk cables is higher. Therefore, QSFP + AOC is the best solution.

Conclusion
With the popularization of 40G Ethernet, the market of 40G QSFP + AOC cable is growing. It is the best choice for short distance and high speed transmission. C-Light provides many AOC products, such as 10G SFP + AOC, 40G QSFP + AOC, QSFP + to 4SFP + AOC, etc. In addition, customized active optical cables have various lengths, Brocade compatibility and other options to meet your needs.Learn more here: 40G QSFP+ AOC VS 40G SR4 QSFP+ Optical Transceiver Module