CodingBox Documentation

Optical Ethernet interfaces

Ethernet optical interfaces follow a naming pattern like 10GBASE-SR. Reading the suffix tells you the medium, reach and wavelength a transceiver is built for.

Reading the suffix

  • S — short reach on multi-mode fibre, 850 nm.
  • L — long reach on single-mode fibre, 1310 nm.
  • E / Z — extended/very long reach on single-mode, around 1550 nm.
  • R — 64b/66b line coding (10G and above).
  • A trailing number is the lane count — SR4 and LR4 use four lanes.

Common examples

InterfaceFibreWavelength
1000BASE-SXMMF850 nm
1000BASE-LXSMF1310 nm
10GBASE-SRMMF850 nm
10GBASE-LRSMF1310 nm
100GBASE-SR4MMF (8 fibres)850 nm ×4
100GBASE-LR4SMF1295–1310 nm (CWDM ×4)

In CodingBox

The module reports its supported interface and wavelength in memory; CodingBox decodes these fields on the Check transceiver screen so you can confirm a transceiver matches the link before deploying it.