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It's called "early media" and it's something standard, sometimes used to announce that the call will be charged at a premium rate and giving the caller a chance
by Rjevski 9y ago
It's called "early media" and it's something standard, sometimes used to announce that the call will be charged at a premium rate and giving the caller a chance to hand up before the call begins and they get charged.
- johansch 9y agoI should have known, an organization as complex as 3GPP couldn't not already have invented this :)