High-Speed Networking of Copper Cable
The Cisco QDD-400-CU3M= is a high-speed networking cable designed for use in data centers and other high-performance computing environments. Specifically, this cable is a 3 meter QSFP-DD to QSFP-DD passive copper cable, which means that it connects two devices with QSFP-DD ports using copper wires.
QSFP-DD (Quad Small Form-factor Pluggable Double Density) is a relatively new type of port that was developed to support faster data rates than the previous generation of QSFP ports. Specifically, QSFP-DD ports can support data rates of up to 400 Gbps (gigabits per second) using four lanes of 100 Gbps each.
The Cisco QDD-400-CU3M= cable is designed to support these high data rates over a distance of up to 3 meters (9.84 feet). It uses four lanes of copper wire to transmit data between the two QSFP-DD ports, and it does not require any external power source or additional components.
One advantage of using a passive copper cable like the QDD-400-CU3M= is that it is typically less expensive than other types of high-speed networking cables, such as active optical cables (AOCs) or fiber optic cables. However, passive copper cables do have some limitations. For example, they have a shorter maximum distance than AOCs or fiber optic cables, and they may be more susceptible to electromagnetic interference (EMI) and other forms of signal degradation.
Virtual and Augmented Reality
The Cisco QDD-400-CU3M= cable is a high-speed, low-latency copper cable designed to connect network switches, servers, and other networking equipment. It uses the QSFP-DD (Quad Small Form-factor Pluggable Double Density) interface, which supports data transfer rates of up to 400 Gbps. The cable is passive, which means it doesn't require any power or signal amplification to transmit data.
Virtual reality (VR) and augmented reality (AR) are technologies that create immersive and interactive digital environments for users. VR typically involves wearing a headset that covers the eyes and ears, while AR overlays digital information onto the real world using a camera or display device. These technologies are not directly related to networking equipment or cables, and there is no apparent connection between the Cisco QDD-400-CU3M= cable and VR/AR.
Definition and Specifications of 3 Meter Passive Cable
The Cisco QDD-400-CU3M= is a 3-meter long QSFP-DD (Quad Small Form-factor Pluggable Double Density) to QSFP-DD passive copper cable. It is used for high-speed data transmission between network devices, such as switches, routers, and servers.
Here are some of the key specifications of the Cisco QDD-400-CU3M=:
- Connector Type: QSFP-DD to QSFP-DD
- Cable Length: 3 meters (9.8 feet)
- Cable Type: Passive Copper Cable
- Data Transfer Rate: 400 Gigabit Ethernet
- Conductor Gauge: 28 AWG
- Operating Temperature Range: 0°C to 70°C (32°F to 158°F)
- Compatible with Cisco QSFP-DD switches and network devices
The QSFP-DD interface is a newer, high-density connector that is capable of transmitting data at speeds of up to 400 Gbps. Passive copper cables, like the Cisco QDD-400-CU3M=, are a cost-effective option for short-range data transmission within a data center or between nearby data centers.
The 28 AWG conductors used in this cable are designed to provide reliable data transmission over short distances while minimizing power consumption. The cable is compatible with Cisco's QSFP-DD switches and other network devices that use this connector type.
General Information about this Cisco QDD-400-CU3M=
- Manufacturer: Cisco
- Part Number or SKU# QDD-400-CU3M=
- Product Type: Copper Cable
Technical Information of Cisco Passive Copper Cable
- Data Transfer Rate: 400 GBPS
- Cable Type: QSFP-DD
- Cable Length: 3 Meter
- Connector Type on First End: QSFP-DD Network
- Connector on First End Details: QSFP-DD Network
- Features: Passive
- Device Supported: Network Device
- Device Supported: Transceiver
About New Bulk Pack Products
Cables - Copper Cable
Coper cables still remain the most popular option in high voltage and low voltage applications such as networking. Despite the disadvantages, such as electromagnetic interference, copper still offers a cost-effective solution for many applications.
How does Copper Cable Transmit Data?
It is a simple process that starts by energizing one side of a copper wire to set electrons in it in motion. The electrons travel to the other end of the wire with the signal information. Since movement is involved, you can expect the electrons to lose their energy and eventually stop moving if the cable is very long. The loss of electron energy leads to a reduction in signal strength. When the electrons stop moving before reaching the other end of the copper wire, a total signal loss occurs. In long-distance data transmission, boosters are placed at an appropriate location to re-energize the electrons. That is usually not a problem of concern when wiring your server because of the short distance involved.
Does Length of Copper Cables Matter?
Yes, it does. As already mentioned, there is a degradation of signals as they move through the copper conductor due to losses. Copper wires have an internal resistance that will oppose the movement of current through them. Data moves through these copper cables as a stream of or pulses of current. The longer the wire, the higher the resistance and more likely signal strength deterioration. Think of it as walking uphill. The further you go, the more tired you become, and you may eventually stop moving.
When you are shopping for copper cables, just make sure you get an appropriate wire length for the application. Do not use a 10-meter cable where you can use a 5-meter cable. You make your system more efficient by using the best cable for the application.
Copper Cables for Every Application
You might have been made to believe that all copper cables are the same. That is not true. Manufacturers of these cables do so with specific applications in mind. A different approach is followed for applications where data rate and bandwidth are a priority. That is why you will find InfiniBand copper cables intended for such applications. Also, the connectors at the end of the copper wires show the intended use. You will find a big difference in the connectors used by IBM's RIO-2 copper cable and HP's X240 direct attach cable.When you are shopping for a copper cable, know what you intend to use it for. If you are not sure, consult with the sales representatives for any help. At ALLHDD, we have a technical team to help you solve any mystery in cable selection. Just contact us for the support you are entitled to get. We will help you to choose the best products and deliver them on time.
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