Within the LSO Reference Architecture, LSO Legato represents the interface between the business-applications layer and service-orchestration functionality, within a service-provider domain. It is the vehicle that takes a business-level operation, such as ordering a service, and communicates that requirement to the service orchestration layer, to instantiate that service within a provider’s domain.
MEF’s work specifically focuses on defining APIs for MEF 3.0 services, including:
See MEF’s Technical Standards & Educational Materials for LSO Legato
LSO Legato is the Interface Reference Point between the business applications and service-orchestration functionality, supporting the management and operations of a service within a service provider’s domain.
By using a common, standard set of APIs to communicate between the business- and service-orchestration layers within a provider domain, numerous cost and operational benefits are realized by both the provider as well as the technology suppliers for both the business applications and the service-orchestration functions.
For example, a technology provider of service-orchestration functionality has to work to ensure they can interface with multiple and often proprietary business applications, including commercial applications and provider-developed custom applications. This need adds significant development cost and product-management costs for the technology provider; it can limit their compatibility for some providers as well as slow down implementation to support custom integration.
Similarly, business-application technology providers, or in some cases providers themselves when using custom-developed applications, have to develop the ability to interface with different, and often proprietary service-orchestration software. Having common, standard APIs, increases the agility of the provider, as well as lowering development and testing costs, and speeding implementation.
Common, industry-standard APIs can significantly reduce costs for both service providers and technology peers of business-application and service-orchestration software.
Standard APIs remove the need for each supplier from having to implement each service provider’s APIs. Service providers avoid the cost of having to implement technology suppliers’ proprietary APIs, which in turn enhances service providers’ ability to adopt best-in-breed solutions. Common information models ease internal development of microservices by eliminating mapping between proprietary models.
LSO Framework Release ‘Ella’ — 2023 Jan
Product Portfolio: LSO Cantata, LSO Sonata, LSO Legato, LSO Presto
The theme of this release is the Introduction of LSO Operational APIs and it also introduces the Billing API. Three APIs and Developer Guides: Product Order Management, Trouble Ticketing, and LSO API Security Profile are now finalized standards, and six additional are in Letter Ballot.
LSO Framework Release ‘Dolly’ — 2022 Jun
Product Portfolio: LSO Cantata, LSO Sonata, LSO Legato, LSO Presto
The theme of this release is Internet Access and adds APIs for Appointment and Work Order. 5 APIs and Developer Guides: Address, Site, POQ, Quote, and Inventory are now finalized standards.
LSO Framework Release ‘Celine’ — 2022 Jan
Product Portfolio: LSO Sonata, LSO Legato, LSO Presto
The theme of this release is Ordering and Inventory: it delivers full coverage of Business Requirements, API and API Developer Guides for Ordering and Inventory API functions. NOTE: Some parts of the release are for MEF Members only.
LSO Framework Release ‘Billie’ — 2021 Jun
Product Portfolio: LSO Legato, LSO Sonata, LSO Presto
The theme of this release is Ordering and Inventory: it delivers full coverage of Business Requirements, API and API Developer Guides for Ordering and Inventory API functions. NOTE: Some parts of the release are for MEF Members only.
LSO Framework Release ‘Aretha’ — 2020 Dec
Product Portfolio: LSO Sonata, LSO Legato, LSO Presto
The theme of this release is Pre-ordering: it delivers full coverage of Business Requirements, API and API Developer Guides for Address, Site Retrieval, and Product Offering Qualification Management.
LSO Legato SDK Release Candidate 4 — 2020 Jul
Product Portfolio: LSO Legato
MEF LSO Legato SDK core includes API definitions for the following functional areas:
• Service Catalog
• Service Ordering
• Service Inventory
• Service Notification
In addition to the Service Provisioning APIs, the SDK includes the following MEF Service Specification schemas:
• SD-WAN Services
• Carrier Ethernet Services
• L1 Connectivity Services
MEF 136 Allegro, Interlude and Legato Service Function Testing Business Requirements & Use Cases — 2023 Apr
Product Portfolio: LSO Allegro, LSO Legato, LSO Interlude
This document defines the Business Requirements and Use Cases to support Service Function Testing (SFT) at the Allegro, Interlude, and Legato Interface Reference Points.
MEF 133 Allegro, Interlude and Legato Fault Management and Performance Monitoring BR&UC — 2023 Feb
Product Portfolio: LSO Allegro, LSO Legato, LSO Interlude
This document defines the Business Requirements and Use Cases to support Performance Moni-toring at the Allegro, Interlude and Legato Interface Reference Points (IRPs).
I want to investigate further. See all LSO Legato resources:
Joining discussions with subject-matter experts provides the insight you need to dig deeply into intra-domain service orchestration and automation within the service provider domain. As a MEF member, you can access the latest LSO Legato projects in the MEF 3.0 LSO Legato Hub on the MEF Members’ Wiki.
All employees of active MEF-member companies are authorized to access MEF Members’ Wiki. Don’t have a login? Register. Not a member? Join MEF. Not sure? Contact Us.
Go to the Member Wiki