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Open Issue #3: Hashed Indices Appendix provides a way to create a GRUU by hashing AOR and instance ID, storing that on registration Remove it when registration expires Incoming call Extract hash from user part of GRUU Look up – if found, proceed, if not, 480 Problem Doesn’t differentiate between “no contacts registered” and “doesn’t exist” Spec currently requires different response codes Proposal Remove this algorithm, suggest another |