The main difference between 100GBASE-SR4 QSFP28 and 100GBASE-LR4 QSFP28 is the transmission distance and connector type. The 100GBASE-SR4 QSFP28 supports 70m@OM3/100m@OM4 transmission with MTP®/MPO connector; while the100GBASE-LR4 QSFP28 supports 10km@SMF transmission with LC duplex connector. By D***z on 06/02/2020

FEC (Forward Error Correction) is an error correction technique to detect and correct a limited number of errors in transmitted data without the need for retransmission. It works by adding redundant bits to a bitstream to help the decoder detect and correct some transmission errors without the need for retransmission. This function needs to be turned on by the transmission device. By K***h on 05/10/2020

Yes, the 100GBASE-LR4 QSFP28 can be used in breakout mode. The breakout mode refers to running multiple ports at lower speeds, the 100GBASE-SR4 QSFP28 can be interoperate with 4x 25GBASE-SR SFP28 #67991 to achieve 4x 25G transmission. By H***r on 04/19/2020

This transceiver is mainly employed in the data center and ethernet for 100G connections of core switches and core routers. By C***a on 03/17/2020

Besides the price advantage we have compared to branded transceivers, FS.COM compatible transceivers also maintain the same performance and reliability. To satisfy our customers' needs of high performance, all of our transceivers are tested multiple times in mainstream original brand switches in our test center before shipped out. By C***t on 07/08/2017

The FS.COM 100GBASE-SR4 QSFP28 transceivers use 12 fibers OM4 MTP® Type B trunk cables for direct connection such as product #68017 and as for 25G to 100G network speed upgrade connection, 8 fibers OM4 MTP®-LC Type B harness cable #68047 can be applied. By N***n on 10/21/2017

As for customized transceivers, FS.COM offers regular custom choices such as compatibility, transmission distance, operating temperature, label pattern, label colors and etc. What's more, FS.COM welcomes any inquiry for customized products and solutions for all need and specifications. By D***n on 08/08/2017

No. The 100G QSFP28 form factor has just 4 electrical lanes, which is not enough to support 10 lanes of 10G electrical interface. A 100G QSFP can only support a 4x10G or 4x25G electrical interface, which can be used as 4x10GbE or 4x25GbE, but not 10x 10GbE.As a result the 100G QSFP SR4 cannot interoperate with SR10 based 100GbE transceivers. By M***s on 06/21/2017

Dust and contamination can accumulate on transceiver's connectors and cause problems such as reducing the optic launch power. To ensure better connection, FS.COM strongly recommends cleaning both connectors each time you disconnect and reconnect them. FS.COM High Quality One-Push Fiber Optic Pen Cleaner for MTP®/MPO Connector is the best cleaning choice for 100GBASE-SR4 QSFP28 transceivers. By W***r on 06/10/2017

No. Network equipment manufacturers do not require that you use only name-brand optics. In fact, when a product fault or defect occurs in the network, and the fault or defect is not attributable to the use of third-party optics, they will continue to provide support for the affected product under warranty or covered by their support program. By M***n on 06/06/2017