Updated OM4 warranty modules for 100G

As Enterprise customers are preparing for the next speed migration, new transceiver solutions have become available on the market for 100G Ethernet and 32G Fibre Channel. Some are based on multimode fibre which can, in many Enterprise architectures, be more cost effective compared to the single mode alternatives oft used in hyperscale data centres. They can be implemented using LC connectivity instead of the more complex MTP connectivity. The latter was required for the initial 100G protocols based on parallel optics.

Nexans has included the following protocols in the updated warranty modules for OM4:

  • Short Wavelength Division Multiplexing (SWDM) for 100G
  • BiDi for 100G
  • 32G Fibre Channel

The updated warranty modules are:

  • LANmark-OF OM4 that support LC trunks and cable termination with pigtails
  • LANmark-OF ULL MTP that support ultra low loss MTP connectivity for parallel optics and LC connectivity with MTP-LC modules

Key distances can be found in the table below.

Updated OM4 warranty modules for 100G


Table: guaranteed reach in a 2 connection channel

These guaranteed distances allow Enterprise data centres to continue to use cost effective multimode solutions, thus avoiding the need to migrate to single mode for existing applications and infrastructure.  Channel lengths in Enterprise data centres oft remain well below the now guaranteed 100m.  

With the recent introduction of ultra low loss modules for MTP connectivity the guaranteed channel lengths for SWDM and BiDi are now the same for both LC trunks and MTP trunks with MTP-LC modules.  
Parallel optics still supports a longer channel length in a 2 connection channel compared to protocols that can use LC connectivity (120m versus 100m). However, this increased distance is usually not required in Enterprise data centres.

With Nexans ultra low loss solutions even more complex data centre configurations with up to 6 connections in a channel are supported as long as the reach remains 100m. Representation of switches, cross connects and connections between data halls is feasible.

Data centre managers can now design their Enterprise data centre around cost effective multimode solutions and easy to use LC connectivity.