We are introducing the “LOS (Loss of Signal) Laser OFF” function for Chorus transport services. This function notifies customer equipment when a DWDM (Dense Wavelength Division Multiplexing) service pathway is disrupted. This notification enables customer equipment to switch to a secondary pathway or alerts the customer that the service pathway is down.

Additionally, this function is utilised when a service traverses 'back-to-back' transponders, such as transitioning from the Core DWDM network to a Regional DWDM network. It informs the 'service' that one of these DWDM sections is broken.  

The feature will be available on transport products such as CRC (Chorus Relay Connect), CXC (Chorus Exchange Connect) lit, and CDCC (Chorus Data Centre Connect).

When are we making these changes?

This change will take effect on 5 May 2025. We believe this change will benefit RSPs and resellers.

What you need to know

If you have an existing service, you will need to complete a Modify order in Chorus Portal to enable the “LOS (Loss of Signal) Laser OFF” feature.  For a new service please contact our Commercial Consulting team.

For detailed technical implementation information including how this impacts you as RSPs, please visit our LOS Laser OFF Implementation Guide.

Contact

If you have any questions or need further information, please contact your Customer Engagement team.