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AT&T IMS, describe article plan, (summary and paragraphs) - Coggle…
AT&T IMS
new stuff
100rel
early media control
late SDP offer
SHAKEN
external voicemail
RC sometimes "Proxy"
Interconnection with different providers
latest SIP standards
originating vs terminating
Two services
Mobile
AT&T features
PBX
RC features
routing
return calls to AT&T
describe article plan
(summary and paragraphs)