5��Ő�΂ɕ��SIP�F5��Ő�΂ɕ��i1/5 �y�[�W�j

SIP�iSession Initiation Protocol�j�Ƃ��t�𕷂��āAIP�d�b��VoIP�Ƃ��̂��v��ׂ�ǎ҂��̂ł͂Ȃ��ł��傤��H �m��SIP�́uIP�d�b�̃v��g�R��ł��v�Ƃ��܂��A�N��C�A��g�ƃT�[�o�Ԃ̒ʐM��S�̃C��^�[�l�b�g��ŁA�u�N��C�A��g��m�̒��ڒʐM��v��Ƃ��傫�ȋ@�\�Ɖ\��Z�p�Ȃ̂ł��BVoIP�^IP�d�b�Ƃ��A�v��P�[�V��ɁA��SIP�Z�p��Ђ��Ƃ��Ă݂܂��傤�B

» 2007�N11��16�� 00��00�� J

[��a�I�C��Ѓ\�t�g�t��g]

�d�b��l�b�g�ōČ��uSIP�v

�@SIP��Ɏg��Ă��VoIP�́A��̖��̂Ƃ��艹��IP�œ`��A�v��P�[�V��ł��B��IP�ŒP�ɑ��ɓ`��邱�Ƃ͈ӊO�ƒP��ŁA�f�W�^��ꂽ��א؂�ɂ��ăp�P�b�g�Ƃ��đ��M��邾��ł��B��̃p�P�b�g��M�ɂ́A�ʏ�RTP�iReal-time Transport Protocol�j�Ƃ��V��v��ȃv��g�R��p��AIP�d�b�ł͂��悻20ms��Ƃ�1�p�P�b�g�i�܂�1�b�Ԃ�50�p�P�b�g�j�𑗂�悤�ɂȂ��Ă��܂��B��̂悤�ȘA��f�B�A�p�P�b�g�̂��Ƃ��f�B�A�X�g��[�~��O�ƌĂт܂��B

�l�b�g��[�N�ŉ��`��ɂ́H

�@��A��RTP�ő��Ɖ��̃p�P�b�g��Ƃ肷�邽�߂ɂ́A��O�ɑ��IP�A�h��X��|�[�g�ԍ��Ă��Ȃ��΂Ȃ�܂��B�܂��A��f�W�^��ۂɂ́A��܂��܂Ȉ��k��A�݂��T�|�[�g��Ă��鈳�k��g�p��K�v��܂��B

�@��̂悤��RTP�ŉ��𑗂荇��߂ɂ́A��O�ɑ��Ƃ̏��̂��Ƃ肪�K�v�ŁA��Ɂu�d�b�v�̋@�\��邽�߂ɂ́A��M�⒅�M�A��A�ؒf�Ƃ��u�Đ��v�ƌĂ΂�鏈��K�v�ɂȂ�܂��BSIP�͂��̂悤�ȌĐ��i��V�O�i��O�j��s��V�O�i��O�v��g�R��Ȃ̂ł��B