40G QSFP+DAC high-speed cable.sfp transceivers module Processing

40G high-speed cable (DAC) refers to the connecting cable with optical fiber transceiver at both ends, which can realize 40Gbps data transmission. It is a cost-effective high-speed interconnection solution. The common types of 40G high-speed cables can be divided into three types: 40G QSFP+to QSFP+DAC, 40GQSFP+to 4 * SFP+DAC, and 40GQSFP+to 4XFP+DAC. The first two types are widely used in practice.

The 40G QSFP+to QSFP+DAC is composed of two 40G QSFP+optical transceivers and copper core wires. This high-speed cable can be used to interconnect the existing 40G QSFP+port to the 40G QSFP+port. Generally, the distance can only be within 7m.

40G QSFP+to 4 × SFP+DAC is composed of one 40G QSFP+optical transceiver, copper core wire and four 10G SFP+optical transceivers. It is mainly used to realize the interconnection between 40G and 10G devices (NICs/HBAs/CNAs, switch devices and servers). Generally, it can only be within 7m.

40G QSFP+to 4XFP DAC is composed of one 40G QSFP+optical transceiver, copper core wire and four 10G XFP optical transceivers. Since the XFP optical transceiver does not have the DAC copper cable standard, the signal compensation provided by the equipment is low, and the cable itself has a large loss, which can only be used for short distance transmission, usually within 2m. Therefore, this high-speed cable can be used to realize the interconnection between the existing 40G QSFP+port and the four XFP ports.