Do You Know About 100G QSFP28 DAC Cable?

The 100GBASE-QSFP28 is designed to carry 100 Gigabit Ethernet. This transceiver type is also used with direct-attach breakout cables to adapt a single 100GbE port to four independent 25 gigabit Ethernet ports (QSFP28-to-4x-SFP28). The QSFP28 transceiver is a high-density, high speed product solution designed for applications in the communications, data center and networking markets. How about the 100GBASE QSFP28 cables? The 100GBASE-QSFP28 is fully covered with 100GBASE DAC twinax cables.

Types of 100G QSFP28 DAC Cable

In the most common places, 100GBASE DAC cables are generally divided into two types. One type is that the two ends of the cable are all 100G QSFP28 connectors. That is, QSFP28 to QSFP28 100G Passive DAC Cable. Another type is that one end is a 100G connector while the other end is four 25G SFP28 connectors. That is 100G QSFP28 to 4×25G SFP28 Fan-out Passive DAC Cable. The detail information of this two kinds of 100G QSFP28 cables will be provided in the following text.

QSFP28 to QSFP28 100G Passive DAC Cable

100G QSFP28 DAC is a 4-channel parallel passive copper cable that is combining four 28 Gbps SFP channels into one high-density cable. It offers 4 independent data transmitting channels and 4 data receiving channels via copper cable. An aggregate data rate of 100Gbps over 5 meters transmission can be achieved by this 100G DAC cable.

This one-meter copper cable integrates a 100G Ethernet-optimized (100 GbE) 38-position “board-as-connector” design with zinc die-cast male QSFP+ connectors for superior EMI resistance, minimal insertion loss and low crosstalk for better performance. Ergonomic at pull-tab ejectors make connecting to equipment a quick, easy task. Eight-pair wire technology is optimized for bandwidth-intense applications, including 100-Gigabit Ethernet (1000GBASE-CR40, 128G Fibre Channel and EDR 4× InfiniBand. Flexible 26 AWG conductors maintain a smooth high-frequency response.

QSFP28 to QSFP28 100G Passive DAC Cable is fully compliant with the MSA (Multi-Source Agreement) SFF-8665 for guaranteed compatibility with all QSFP and QSFP+ posts as well as IEEE 802.3bj. It is ideal for connecting active network equipment in data centers, high-end servers and enterprise wiring closets.

100G QSFP28 to 4×25G SFP28 Fan-out Passive DAC Cable

100G QSFP28 to 4×25G SFP28 application is commonly known as a “fan-out’ assembly which is a hybrid transition from a QSFP28 on one end to four individual SFP28 on the other end. Fan-out cable, also called breakout cable, made of several simplex cables bundled together inside a common jacket. The 100G QSFP28 to 4×25G SFP28 fan-out DAC offers four parallel, bi-directional channels each operating at up to 25.78125 Gps. The copper link length is up to 4 m.

100G QSFP28 to 4×25 SFP28 breakout DAC cable has many benefits, such as low crosstalk, small bend radius and lower total system power. This kind of cable offers precision external cable assembly solutions. They meet the ever increasing demand for higher channel density with high-level signal integrity in high performance computing, top-of-rack switching, and network storage deployments. QSFP28 to 4×SFP28 breakout DAC cable supports 100G to 4×25G Ethernet interoperability with simplified cable installation. And thus, it is available to many applications, such as 100G Ethernet transmission, Infiniband, servers, switches, storage and host card adapters for Data center interconnect, and high-performance computing clusters.

Summary

QSFP28 to QSFP28 100G passive DAC cable and 100G QSFP28 to 4×25G SFP28 fan-out passive DAC cable are two commonly types of 100G QSFP28. You can choose an appropriate one based on your own need. If you are in the absence of one-one port cable, QSFP28 to QSFP28 100G passive DAC cable will be nice. When the one-four ports are required, and then 100G QSFP28 to 4×25G SFP28 fan-out passive DAC cable is highly recommended.