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Overview of the solution
The solution can be broken into three parts
Discovery
The client discovers the configuration server (or configuration "root URI") using DNS U-NAPTR or SRV queries from the domain of user's AoR
Existing configuration protocols (ACAP, SIP-UA-Config, etc.) could also be used after discovery of the configuration server
Retrieving a bootstrap document
The client retrieves an bootstrap document from the configuration server using HTTP GET
The bootstrap document describes the available configuration objects and/or their URIs
This step may be skipped if the client knows the location of the configuration object(s) it is interested in
Retrieving a configuration object
The client retrieves the configuration object(s) using HTTP GET
Object defines configuration options using well-known markup

PPT Version