LSO Legato (BUS:SOF) belongs to the family of LSO Interface Reference Points (IRP) as defined by MEF 55. It defines the management reference point between the business applications and service orchestration functionality needed to allow management and operations interactions supporting LSO services. It uses an end-to-end service view across one or more Operator domains from the LSO orchestrator.

LSO Legato is used both in the Service Provider domain and in the Partner domain.




  • Business Applications request service feasibility determination.
  • Business Applications request reservation of resources related to a potential Service and/or Service Components.
  • Business Applications request activation of Service and/or Service Components.
  • Business Applications receive service activation tracking status updates.
  • Configuration of Service Specifications in the Service Orchestration Functionality.
  • Business Applications receive request to initiate Product Order with a Partner provider (for off-net portions of the service).
  • Business Applications receive usage events due to a Customer initiating dynamic activity on their Service (e.g. increase in bandwidth)
  • Business Applications receive a summary of service quality and usage information.
  • Business Applications receive Service Activation Testing results.






Source(s) and Reference(s)

MEF 55 |