ITU-T H.460.7 PDF

This Recommendation defines the usage of Digit Maps within ITU-T H.323 systems. Digit Maps can improve the post dial delay experienced by the user and can reduce the amount of provisioning that would otherwise have to occur in order to reduce such delays. A Digit Map is a set of textual strings that serve as a template representing the dialling plan available to the endpoint.

Digit Map information is conveyed from the gatekeeper to the endpoint following registration. The advertisement of capabilities and the conveyance of Digit Maps are performed through the use of the Generic Extensibility Framework, as defined in [ITU-T H.323].