https://app.knowbase.one/vault/rfc/docid/9324
RFC8606: ISDN User Part (ISUP) Cause Location Parameter for the SIP Reason Header Field
Internet Engineering Task Force (IETF) R. Jesske Request for Comments: 8606 Deutsche Telekom Updates: 3326 June 2019 Category: Standards Track ISSN: 2070-1721 ISDN User Part (IS...