MEF standardises the wholesale and inter-carrier side of connectivity — how one network operator buys capacity, orders services and settles with another. Its Lifecycle Service Orchestration (LSO) APIs, notably LSO Sonata for inter-provider ordering, are the machine-readable contracts behind carrier-to-carrier commerce.
MEF
MEF is the standards body for the part of telecom that never touches a consumer: the market where carriers sell to each other.
- LSO Sonata - The inter-provider interface covering address validation, product offering qualification, quoting, ordering and inventory between operators.
- LSO Interlude - The runtime counterpart, covering service operations between providers once a service is live.
- Openly published - MEF’s LSO specifications are downloadable as OpenAPI, and ninety-four definitions were harvested for The State of Telecom APIs.
- A working example of the sector’s pattern - The wholesale market has better standardised, more openly published contracts than the retail one, and almost no developer will ever call them.
MEF matters to anyone reasoning about telecom’s API economics because it shows the industry can and does standardise commercial transactions in machine-readable form — when the counterparty is another carrier rather than a developer.
Referenced in API Evangelist papers
This standard shows up in my published research. These reports read the machine-readable evidence provider by provider — and put this standard in the context of a real sector.
The State of Telecom APIs
94 openly published LSO definitions — the wholesale market standardises its commerce in machine-readable form while the retail market does not.
