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IMS: In what scenarios, an UE (IMS client) sends subscribe message to IMS server and when server notify UE ?

+3 votes
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In some IMS call flow, I saw SUBSCRIBE message from UE to IMS server. I want to know in what cases/scenarios, UE sends SUBSCRIBE message to server and server sends NOTIFY message to UE ?

posted Jul 31, 2016 by Ganesh

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