등록 간격을 조정하고 SIP 옵션 유지를 활성화하여 SIP 전화가 등록되었지만 PBX가 여전히 확장을 오프라인으로 보고하는 경우를 해결하는 방법에 대해 알아보십시오.
일부 환경에서 전화기는 SIP 회선을 등록됨으로 표시하지만, PBX에서는 내선 번호가 오프라인으로 표시됩니다. 해당 문제는 라우터 또는 NAT 동작과 관련된 경우가 많습니다. 상태 동기화를 개선하려면 전화기의 지속 연결 유지(Keep-Alive) 유형을 SIP OPTIONS로 변경하고 유지 간격을 15초로 설정하세요.
지원 제품: 모든 전화기 모델
지원 펌웨어: 지원 모델의 모든 펌웨어 버전
① 스위치에 연결되고 IP 주소를 자동으로 획득하는 BX4U 전화기 2대
② 동일 스위치에 연결되며 전화기와 네트워크 통신이 정상 확인된 설정용 PC

전화기 웹 인터페이스에 로그인한 후 회선 - SIP 메뉴로 이동합니다. 등록 만료 시간을 120초 또는 300초로 변경 후 제출을 클릭합니다.

1. 전화기 웹 인터페이스에 로그인합니다.
2. 회선 - SIP - 고급 설정으로 이동합니다.
3. 연결 유지 유형을 SIP OPTIONS로 지정하고 연결 유지 간격을 15초로 설정합니다.
4. 페이지 하단의 제출 버튼을 클릭합니다.

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