https://app.knowbase.one/vault/rfc/docid/7485
RFC6872: The Common Log Format (CLF) for the Session Initiation Protocol (SIP): Framework and Information Model
Internet Engineering Task Force (IETF) V. Gurbani, Ed. Request for Comments: 6872 Bell Laboratories, Alcatel-Lucent Category: Standards Track E. Burger, Ed. ISSN: 2070-1721 Georgetown University ...