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Indicating DND condition to caller Are requirements different from indicating DND to proxy? May wish to hide the condition from a caller: use 486 Busy Here, perhaps with Retry-After use 180 followed by 408 Where condition is to be indicated, reason phrase could be used (but language problem) Is it sufficient just to rely on proxy to conceal information from caller (e.g., by changing response code) if policy is to reject call rather than forward to voicemail etc.? HERFP problem – prioritisation of DND response compared with responses from other branches |