技术专区
DAC (Direct Attach Cable),it use silver plated conductor and foamed insulation core wire as the material, using wire-pair shielding and total shielding, thus forming a high-speed cable.
Here introduce two types Direct Attach Cable:
1. 100G QSFP28 DAC
• 100GE QSFP28 Passive Copper provides customers with 100Gb/high-bandwidth data connectivity, 4-way duplex channels, 25Gb/s per channel working rate, and 100Gb/s aggregation bandwidth
• Complies with SFF-8665/SFF-8679 and IEEE 802.3bj and Infiniband EDR
• Provides support for distances ranging from 1m to 3m. This product is widely used in data center or supercomputer system scenarios
2. 100GE QSFP28 to 25G SFP28 DAC
• 100GE QSFP28 to 4x 25GE SFP28 parallel fan-out passive copper cables provide customers with 100Gb/high-bandwidth data connectivity, including 100GE QSFP28 on one end and 4X 25GE SFP28 on the other end
• Complies with SFF-8665/SFF-8679 and IEEE 802.3bj and Infiniband EDR
• Provides support for distances ranging from 1m to 3m. This product is widely used in data center or supercomputer system scenarios.
DAC application:
DAC are generally used on Ethernet switches, such as LY2 switches.
AOC :Active Optical Cable, the main components of the active optical cable are divided into two parts: the optical path and the circuit. The optical path part includes the lens and FA for converting the optical path angle; the circuit part includes the PCB board, the substrate, the VCSEL chip, the VCSEL driver chip, the PD chip and the TIA chip. As a main transmission medium for high-performance computers and data centers, active optical cables ensure the stability of transportation and application flexibility, and are common in high-density applications.
Here introduce two types Active Optical Cable:
1. 40G QSFP+to 4X10G SFP+AOC
2. 40G QSFP+ AOC
Product features:
Electrical Interface Compatible with QSFP+ Connectors (Set Trigger - 8436) and SFP+ Connectors (Set Trigger - 8431)
. Hot-swappable
.850nm VCSEL Transmitter, PIN Laser Detector
.OM3 MMF up to 100m
Working temperature: 0 - 70°C
. Full metal housing with superior EMI performance
. Meet RoHS6 (lead-free)
Active Optical Cable advantages:
1: Greater bandwidth: don’t need device to update, throughput up to 40Gbps.
2: Weight is light, easy to delivery
3: Low electromagnetic interference: Since the optical fiber is a dielectric, it is not susceptible to electromagnetic interference.
Disadvantages of Direct Attach Cable:
1: The transmission distance is short, heavy, bulky and difficult to manage.
2: susceptible to electromagnetic interference, for example, It may cause problems such as poor response and degradation.
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