The Registry Telephone Number data model consists of several fields: Country Code, Area Code, Number, and Extension. While this allows for structured data collection and rendering, some deployers may find it preferable to limit collection to a single, unstructured field. This can be accomplished by limiting the Permitted Fields to Number.
It is possible to set which Telephone Number fields are permitted via Configuration > CO Settings. These settings apply to Telephone Number collection in all contexts.
When adding a new Telephone Number via the UI, it is possible to set the default value for the Telephone Number type via Configuration > CO Settings.