. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "RFC3261"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "RFC 3261: SIP: Session Initiation Protocol"@en . . . . . "RFC 3261: SIP: Session Initiation Protocol"@en . . . . . . . . . . . . . . . . . . . . . . . "A. Johnston" . "RFC 3261: SIP: Session Initiation Protocol"@en . . . . "10.17487/RFC3261" . . . . . . . . . . . . . "3261" . . . . . . . . . "SIP: Session Initiation Protocol"@en . . . "E. Schooler" . . . . . . . . . . . "request for comments publication"@en . . . . . . . . "2002-06-01T00:00:00Z"^^ . . "SIP: Session Initiation Protocol"@en . . . . . . . . . . "269"^^ . . . . . . . . "\u043F\u0443\u0431\u043B\u0456\u043A\u0430\u0446\u0456\u044F \u0437\u0430\u043F\u0438\u0442\u0443 \u043A\u043E\u043C\u0435\u043D\u0442\u0430\u0440\u0456\u0432"@uk . . . . . . "journals/rfc/rfc3261" . . . .