Both 25G high speed cable and 25G active fiber optic cable can achieve 25Gbps data transmission, but what is the difference between them?

1. What is 25G QSFP28 DAC High Speed Cable.

25G high-speed cable adopts silver-plated conductor and foam insulation core, with excellent attenuation performance and low delay performance, so that the signal transmission is correct, but also can improve the transmission speed, is a substitute for the optical module of the short-distance connection solution, the price is much cheaper than the same type of optical module, in the short-distance connection applications are widely welcomed.

25G SFP28 to SFP28 DAC is a very cost-effective solution for short-distance link transmission. It can establish a 25G link through the SFP28 port of the switch, which complies with the IEEE P802.3by and SFF-8402 SFP28 standards, and is widely used in data center or supercomputing center system scenarios.

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2. What is 25G QSFP28 AOC active fiber optic cable:

25G active fiber optic cable is a fiber optic cable that can be used in data centers or supercomputing centers.

25G active optical cable can overcome the bandwidth limitations of traditional high-speed cables, and this 25G active optical cable can provide an ideal alternative solution to high-speed cables and short-range SFP28 optical modules, with more signal integrity and higher performance, so it is widely used in high-rate, high-density and low-power data center networks.

The 25G AOC active cable is available in 25G SFP28 AOC only. 25G SFP28 AOC can reach up to 70m with OM3 multimode fiber and 100m with OM4 multimode fiber, which is suitable for short-distance data communication and interconnection applications and provides a cost-effective way of connecting racks and adjacent racks. It is suitable for short distance data communication and interconnection applications and provides a cost effective way to connect racks and neighboring racks.

3. Advantages of 25G high-speed cable vs. 25G active fiber optic cable:

25G high-speed cables can support transmission rates up to 25Gbps, which is a higher data rate than that supported by traditional copper cables. 25G active fiber optic cables are suitable for 25G and 10G Ethernet, high-capacity IO with SFP+ interfaces, data centers, and inter-rack connectivity.

The size and weight of 25G active fiber optic cables are one-half and one-quarter of 25G high-speed cables, so 25G active fiber optic cables are much lighter than 25G high-speed cables; no equipment upgrades are required, and 25G active fiber optic cables have a throughput of up to 25 Gbps; 25G active fiber optic cables also have better transmission performance and bit error rate, with BER up to 10-15; and 25G active fiber optic cables have lower transmission power on the system link. lower transmission power on the system link.

4. 25G DAC high-speed cable and 25G AOC active fiber optic cable structure:

25G high-speed cable consists of a copper cable and fiber optic transceiver device at both ends, it uses a connector and optical module interface is similar, but the high-speed cable above the connector module does not have expensive lasers, which greatly reduces the cost of short-distance applications.

25G active fiber optic cable consists of fiber optic transceivers at both ends and different lengths of OM3 or OM4 multimode fibers. The transceivers at both ends can provide optoelectronic conversion as well as optical transmission, which ensures the stability of the data transmission and the flexibility of the application.

5. 25G DAC high-speed cable and 25G AOC active fiber optic cable applications:

25G high-speed cables are mainly used in switches/routers/HBAs, servers and data storage devices, 40Gbs/100GBS Ethernet, and Fiber Channel.

25G active fiber optic cables are suitable for 25G and 10G Ethernet, high-capacity IO with SFP+ interfaces, data centers and inter-rack connections.

Walsun 25G direct-connect cables can meet the user's needs for 25G network construction. In general, the choice of SFP28 DAC/AOC cables for short-distance links in 25G networks has the advantage of high cost performance.

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