豆豆技术网--voip基本概念(7)语音编码器.mht

voip前景广泛
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------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/teachonline.gif
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------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/add.gif
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------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/bg3-1.gif

R0lGODlhCAAIAKIAAMvm/v///+j0//X6/9bm/+v2/wAAAAAAACH5BAQUAP8ALAAAAAAIAAgAAAMU
GCMEDiEG8WQczkaqI+lBAQ5gkAAAOw==

------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/bg4-1.gif

R0lGODlhCAAIAJEAAMvm/tXr/v///9/v/iH5BAQUAP8ALAAAAAAIAAgAAAIQhG+BN2vigGhLCIXs
zHqqAgA7

------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/bg4-2.gif

R0lGODlhCAAIAJEAAMvm/tXr/v///9/v/iH5BAQUAP8ALAAAAAAIAAgAAAIQhI8ZacMg2IgoCNpu
DFOLAgA7

------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/bg3-2.gif

R0lGODlhCAAIAKIAAMvm/v///+j0//X6/9bm/+v2/wAAAAAAACH5BAQUAP8ALAAAAAAIAAgAAAMS
CKoysSLIB9x88QaiZemBBXYJADs=

------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/pre.gif
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------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/gif
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/images/bg1.gif

R0lGODlhFAAeAMQAAGy2//f7/7Xa/4rF/9fr/5nM/32+/8Ph//H4/63W/3K5/9Ho/+Tx/4DA/3W7
/7/f//b6/5LJ/6PR/////+j0/97u/7XW/8fj/4bD/9bq/wAAAAAAAAAAAAAAAAAAAAAAACH5BAQU
AP8ALAAAAAAUAB4AAAVqIOBEAjOdaKpCzBM52KXO9DGadH4mjqznBIPgl6s4EkRaxeBLpjIAnBMl
MECmqQESe6oopFhJhHuiKAjkSaKQpgAo6cGQfDGkA+805pFepxkOaRNfaQ0LaSRpEmxkAmNkGRht
AGkIlGkAIQA7

------=_NextPart_000_00DC_01C4F977.727CC320
Content-Type: image/jpeg
Content-Transfer-Encoding: base64
Content-Location: http://www.ddvip.net/router/voip/index/img/2004513222519.jpg
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