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What is the difference between user and subscription in IMS?

+2 votes
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In 3GPP TS 23.228 4.3.3.1 Private User Identities
It said "Every IM CN subsystem user shall have one or more Private User Identities."
and "The Private User Identity identifies the subscription, not the user."

What is the difference between user and subscription in IMS?
and why user needs more than one Private User Identities?

posted Feb 17, 2017 by Jim Tan
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