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 *** on 06/02/2020

The main difference between 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 is the working wavelengths. For 100GBASE-CWDM4 QSFP28, the operating wavelength of is 1271nm, 1291nm, 1311nm, 1331nm, wavelength interval is 20nm; and for 100GBASE-LR4 QSFP28, the operating wavelength is 1295.56nm, 1300.05nm, 1304.58nm, 1309.14nm, and the wavelength interval is about 5nm. So they can not communicate with each other.

by *** on 05/20/2020

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 *** on 05/10/2020

The transceiver is mainly employed in the data center, ethernet and telecom for 100G connections of core switches, core routers and 5G networks.

by *** on 09/23/2024

The difference between 100GBASE-LR4 QSFP28 1310nm 10km and 100GBASE-LR QSFP28 Single Lambda 1310nm 10km is in hardware. The modulation mode of 100GBASE-LR QSFP28 Single Lambda is PAM4, while the modulation mode of 100GBASE-LR4 QSFP28 is non-return-to-zero code (NRZ) modulation. Products using NRZ modulation are mainly used in 4G Ethernet. The PAM4 pattern is 4 times faster than NRZ modulation in transmission.

by *** on 01/30/2020