Are you familiar with QSFP-40G-SR4?

The rapid growth of server, network and Internet traffic drives the need for higher data rate, higher density and lower cost fiber optic Ethernet solutions, especially in data centers. As 10 Gbit/s speed is not fast enough for some enterprises, the IEEE 802.3 working group introduced the 40 and 100 Gbit/s 802.3ba standard. For 40G port types, there are 40G-CR4, 40G-KR4, 40GBASE-SR4, 40GBASE-LR4, 40GBASE-ER4, 40G-FR, 40GBASE-T. As the needs for speed and performance increase, optical transceivers have become an integral part of the overall system design. The transceiver that supports 40G is called a quad form factor pluggable module. This article will introduce something about QSFP-40G-SR4.

40GBASE-SR4 (“short range”) is a type of port for multimode fiber and uses 850 nm lasers. It is used for short-haul fiber connections. Its 64b/66b PCS physical encoding sublayer is defined in IEEE 802.3 clause 82 and its physical medium-dependent PMD in clause 86. It uses four lanes of multimode fiber delivering serialized data at a rate of 10.3125 Gbit/s per lane. 40GBASE-SR4 has a range of 100m on OM3 and 150m on OM4. There is a longer range variant 40G-eSR4 with a range of 300m on OM3 and 400m on OM4. This extended range is equivalent to the range of 10G-SR.

The 40G-SR4 QSFP module supports link lengths of 100 meters and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. Requires special MTP/MPO cabling. And the MTP/MPO fiber cable is a ribbon that generally bundles 12 fiber strands. The transceiver mainly supports 40G optical links over a high-bandwidth 12-strand MPO/MTP multi-fiber cable. But the QSFP-40G-SR4 transceiver only uses 8 threads. With an increasing number of network connections in data centers, the 12-fiber channel 40GbE migration plan is quickly becoming a matter of survival. Create a simple and cost-effective migration path by installing a structured cabling system that can meet your future 40GbE network needs.

Here are the product details about the 40G-SR4 QSFP+ transceivers:

• 4-lane vertical cavity surface-emitting laser at 850 nm
• Electrically hot-pluggable and easy to insert and remove
• Support diagnostic functions, providing real-time monitoring of transmitted optical power
• Received optical power, laser bias current, temperature, supply voltage
• Industry standard 1×8 or 1×12 MTP (MPO) ribbon cable connector
• Maximum link lengths of 100 m on OM3 multimode fiber; Link lengths of 150 m on OM4 multimode fiber
• Case operating temperature range: 0 to 70 centigrade (32 to 158 Fahrenheit)
• QSFP+ MAS compliant

The QSFP 40G-SR4 module can also be used in a 4x10G mode for interoperability with 10G-SR interfaces up to 100 and 150 meters on OM3 and OM4 fibers, respectively. Operation in 4x10G mode is enabled by optimizing the transmit and receive optical characteristics of the QSFP-40G-SR4 to avoid receiver overload or unnecessary triggering of alarm thresholds in the 10GBASE-SR receiver while being fully interoperable with all standard 40G-SR4 interfaces. 4x10G connectivity is achieved using an external parallel 12-fiber to 2-fiber duplex (LC-LC Duplex 10G OM4 MM) cable, which connects the 40G-SR4 module to four 10GBASE-SR SFP+ MMFs. This connectivity can also be achieved using an OM4 8-fiber to 12-wire MTP harness cable.

This QSFP-40G-SR4 is optimized to ensure interoperability with any IEEE 40G-SR4 and 10G-SR (in 4x10G mode). In addition, we have a test center with professionally trained personnel, advanced testing facilities, and comprehensive original-brand switches, to ensure that our customers receive superior quality optics.