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https://datatracker.ietf.org/doc/draft-lendl-sip-peering-policy/
draft-lendl-sip-peering-policy-00 - Publishing SIP Peering Policy
This documents proposes the use of DNS entries to publish a SIP proxy's policy for accepting incoming calls. Such published policies can be used to selectively...
peering policydraftlendlsippublishing