📄 003_29.htm
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<DIV class=pg></DIV><!-- bitmap and vector images are written here -->
<DIV class=im0><IMG height=121 src="003_29.files/003_29_1.jpg" width=561
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<DIV class=im3><IMG height=64 src="003_29.files/left.jpg" width=564
border=0></DIV><!-- text starts here --><SPAN class=ps0><NOBR><SPAN
class=ft0>128 <SPAN class=em0>IP </SPAN><SPAN
class=em4>电话技术:稳定的</SPAN><SPAN class=em0>VoIP</SPAN><SPAN
class=em4>服务集成</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps1><NOBR><SPAN
class=ft1>(<SPAN class=em5>续</SPAN>)</SPAN></NOBR></SPAN> <SPAN
class=ps2><NOBR>指令<SPAN class=em1>/</SPAN>响应</NOBR></SPAN> <SPAN
class=ps3><NOBR>参</NOBR></SPAN> <SPAN class=ps4><NOBR>数</NOBR></SPAN> <SPAN
class=ps5><NOBR>语法说明</NOBR></SPAN> <SPAN class=ps6><NOBR><SPAN
class=ft3>NTFY</SPAN></NOBR></SPAN> <SPAN class=ps7><NOBR><SPAN class=ft3>(<SPAN
class=em2>从呼叫端点到</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps8><NOBR><SPAN
class=ft3>MGC<SPAN class=em2>的信息</SPAN>)</SPAN></NOBR></SPAN> <SPAN
class=ps9><NOBR>(<SPAN class=em1>7</SPAN>)</NOBR></SPAN> <SPAN
class=ps10><NOBR>在这一点上,请求处理者需要翻译<SPAN
class=em1>E.164</SPAN>数字串(所拨的电话号码),把它转变成端点和域名,或者<SPAN
class=em1>IP</SPAN>地址。</NOBR></SPAN> <SPAN class=ps11><NOBR><SPAN
class=ft3>ACK</SPAN></NOBR></SPAN> <SPAN class=ps12><NOBR>(从<SPAN
class=em1>MGC</SPAN>到呼叫</NOBR></SPAN> <SPAN class=ps13><NOBR>端点)</NOBR></SPAN>
<SPAN class=ps14><NOBR>(<SPAN class=em1>8</SPAN>)</NOBR></SPAN> <SPAN
class=ps15><NOBR><SPAN class=ft3>RQNT</SPAN></NOBR></SPAN> <SPAN
class=ps16><NOBR>(从<SPAN class=em1>MGC</SPAN>到呼叫</NOBR></SPAN> <SPAN
class=ps17><NOBR>端点的消息)</NOBR></SPAN> <SPAN class=ps18><NOBR>(<SPAN
class=em1>9</SPAN>)</NOBR></SPAN> <SPAN class=ps19><NOBR><SPAN
class=ft3>ACK</SPAN></NOBR></SPAN> <SPAN class=ps20><NOBR>(从呼叫端点到</NOBR></SPAN>
<SPAN class=ps21><NOBR><SPAN class=ft3>MGC<SPAN
class=em2>)</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps22><NOBR>(<SPAN
class=em1>10</SPAN>)</NOBR></SPAN> <SPAN class=ps23><NOBR><SPAN
class=ft3>CRCX</SPAN></NOBR></SPAN> <SPAN class=ps24><NOBR>(从<SPAN
class=em1>MGC</SPAN>到被</NOBR></SPAN> <SPAN
class=ps25><NOBR>叫端点的消息)</NOBR></SPAN> <SPAN class=ps26><NOBR>(<SPAN
class=em1>11</SPAN>)</NOBR></SPAN> <SPAN class=ps27><NOBR>注意在<SPAN
class=em1>CRCX</SPAN>指令中第二个端点接收<SPAN class=em1>SDP</SPAN>发信方媒质编码的能力。<SPAN
class=em1>ACK</SPAN>接着指出请求端点不支持媒质格</NOBR></SPAN> <SPAN
class=ps28><NOBR>式;端点之间必须通过<SPAN class=em1>MGC</SPAN>请求处理器进行协商。允许端点标明在<SPAN
class=em1>SDP</SPAN>中所支持的媒质编码,<SPAN class=em1>MGC</SPAN>会在两个端</NOBR></SPAN>
<SPAN class=ps29><NOBR>点中选择一个现存的编码</NOBR></SPAN> <SPAN class=ps30><NOBR><SPAN
class=ft3>ACK</SPAN></NOBR></SPAN> <SPAN class=ps31><NOBR>(从被叫端点到</NOBR></SPAN>
<SPAN class=ps32><NOBR><SPAN class=ft3>MGC<SPAN
class=em2>)</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps33><NOBR>(<SPAN
class=em1>12</SPAN>)</NOBR></SPAN> <SPAN class=ps34><NOBR><SPAN class=ft3>578
aaln/1@yourfavorite.net MGCP 0.1</SPAN></NOBR></SPAN> <SPAN
class=ps35><NOBR><SPAN class=ft3>N:mgc@ yourfavorite.net<SPAN
class=em2>:</SPAN>5678</SPAN></NOBR></SPAN> <SPAN class=ps36><NOBR><SPAN
class=ft3>X<SPAN class=em2>:</SPAN>ABCD57</SPAN></NOBR></SPAN> <SPAN
class=ps37><NOBR><SPAN class=ft3>O<SPAN
class=em2>:</SPAN>1,7,0,3,5,5,5,1,2,1,2</SPAN></NOBR></SPAN> <SPAN
class=ps38><NOBR><SPAN class=ft3>200 62 OK</SPAN></NOBR></SPAN> <SPAN
class=ps39><NOBR><SPAN class=ft3>I<SPAN
class=em2>:</SPAN>01054D</SPAN></NOBR></SPAN> <SPAN class=ps40><NOBR><SPAN
class=ft3>v=0</SPAN></NOBR></SPAN> <SPAN class=ps41><NOBR><SPAN class=ft3>c=IN
IP4 10.1.70.17</SPAN></NOBR></SPAN> <SPAN class=ps42><NOBR><SPAN
class=ft3>m=audio 1297 RTP/AVP 0</SPAN></NOBR></SPAN> <SPAN
class=ps43><NOBR>被叫端点选择的连接<SPAN class=em1>ID</SPAN></NOBR></SPAN> <SPAN
class=ps44><NOBR>被叫端点返回它自己的<SPAN class=em1>SDP <SPAN
class=em2>,</SPAN></SPAN>如端</NOBR></SPAN> <SPAN class=ps45><NOBR>点<SPAN
class=em1>IP</SPAN>地址,<SPAN class=em1>UDP</SPAN>端口,连接的截止类型</NOBR></SPAN> <SPAN
class=ps46><NOBR>和模式</NOBR></SPAN> <SPAN class=ps47><NOBR><SPAN class=ft3>200
578 OK</SPAN></NOBR></SPAN> <SPAN class=ps48><NOBR><SPAN
class=ft3>60aaln/1@yourfavorite.net MGCP0.1</SPAN></NOBR></SPAN> <SPAN
class=ps49><NOBR><SPAN class=ft3>X<SPAN
class=em2>:</SPAN>ABCD58</SPAN></NOBR></SPAN> <SPAN class=ps50><NOBR><SPAN
class=ft3>R<SPAN class=em2>:</SPAN>hu</SPAN></NOBR></SPAN> <SPAN
class=ps51><NOBR><SPAN class=ft3>200 60 OK</SPAN></NOBR></SPAN> <SPAN
class=ps52><NOBR><SPAN class=ft3>62aaln/1@yourfavorite2.net MGCP
0.1</SPAN></NOBR></SPAN> <SPAN class=ps53><NOBR><SPAN
class=ft3>C:ABCD3</SPAN></NOBR></SPAN> <SPAN class=ps54><NOBR><SPAN
class=ft3>L:p:10,a:PCMU</SPAN></NOBR></SPAN> <SPAN class=ps55><NOBR><SPAN
class=ft3>M:sendrecv</SPAN></NOBR></SPAN> <SPAN class=ps56><NOBR><SPAN
class=ft3>N:mgc@yourfavorite2.net:5678</SPAN></NOBR></SPAN> <SPAN
class=ps57><NOBR><SPAN class=ft3>X:ABCD58</SPAN></NOBR></SPAN> <SPAN
class=ps58><NOBR><SPAN class=ft3>R:hd</SPAN></NOBR></SPAN> <SPAN
class=ps59><NOBR><SPAN class=ft3>S:rg</SPAN></NOBR></SPAN> <SPAN
class=ps60><NOBR><SPAN class=ft3>v=0</SPAN></NOBR></SPAN> <SPAN
class=ps61><NOBR><SPAN class=ft3>c=IN IP4 10.1.70.15</SPAN></NOBR></SPAN> <SPAN
class=ps62><NOBR><SPAN class=ft3>m=audio 3456 RTP/AVP 0</SPAN></NOBR></SPAN>
<SPAN class=ps63><NOBR><SPAN class=ft3>MGC<SPAN
class=em2>接收的通知,匹配事务处理</SPAN>ID</SPAN></NOBR></SPAN> <SPAN
class=ps64><NOBR>通知请求,事务处理<SPAN class=em1>ID60<SPAN
class=em2>,</SPAN></SPAN>远程端</NOBR></SPAN> <SPAN
class=ps65><NOBR>点名称</NOBR></SPAN> <SPAN class=ps66><NOBR>请求<SPAN
class=em1>ID</SPAN></NOBR></SPAN> <SPAN
class=ps67><NOBR>停止搜集数字,查询指令的连接。</NOBR></SPAN> <SPAN
class=ps68><NOBR>注意这里没有先前从<SPAN class=em1>MGC</SPAN>到<SPAN
class=em1>MG</SPAN>通知请</NOBR></SPAN> <SPAN class=ps69><NOBR>求的存储</NOBR></SPAN>
<SPAN class=ps70><NOBR>端点接受通知请求</NOBR></SPAN> <SPAN class=ps71><NOBR><SPAN
class=ft3>MGC<SPAN class=em2>需要在被叫端点建立一个连接。</SPAN></SPAN></NOBR></SPAN> <SPAN
class=ps72><NOBR>端点标识符指向流出电路</NOBR></SPAN> <SPAN class=ps73><NOBR>在两个端点请求<SPAN
class=em1>ID</SPAN>是相同的</NOBR></SPAN> <SPAN
class=ps74><NOBR>本地连接选项:</NOBR></SPAN> <SPAN class=ps75><NOBR><SPAN
class=ft3>packetization<SPAN class=em2>=</SPAN>10<SPAN
class=em2>秒,</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps76><NOBR>音频类型=<SPAN
class=em3>PCM µLaw</SPAN></NOBR></SPAN> <SPAN
class=ps77><NOBR>在两个端点必须相同</NOBR></SPAN> <SPAN
class=ps78><NOBR>连接模式是全双工的。存在</NOBR></SPAN> <SPAN class=ps79><NOBR><SPAN
class=ft4>S D P <SPAN class=em2>,</SPAN></SPAN></NOBR></SPAN> <SPAN
class=ps80><NOBR>可以这样实现</NOBR></SPAN> <SPAN
class=ps81><NOBR>通知实体,为了被叫方的域名</NOBR></SPAN> <SPAN class=ps82><NOBR>请求<SPAN
class=em1>ID</SPAN></NOBR></SPAN> <SPAN class=ps83><NOBR>寻找摘机</NOBR></SPAN>
<SPAN class=ps84><NOBR>信号:电话振铃。当电话脱离摘机</NOBR></SPAN> <SPAN
class=ps85><NOBR>状态时,振铃停止</NOBR></SPAN> <SPAN class=ps86><NOBR>这是连接的<SPAN
class=em1>SDP <SPAN class=em2>,</SPAN></SPAN>在两个端点必须</NOBR></SPAN> <SPAN
class=ps87><NOBR>相同</NOBR></SPAN> <SPAN class=ps88><NOBR>通知,事务处理<SPAN
class=em1>ID578<SPAN class=em2>,</SPAN></SPAN>端点名称</NOBR></SPAN> <SPAN
class=ps89><NOBR>通知实体仍然是<SPAN class=em1>mgc@ yourfavorite.</SPAN></NOBR></SPAN>
<SPAN class=ps90><NOBR><SPAN class=ft3>net<SPAN
class=em2>:</SPAN>5678</SPAN></NOBR></SPAN> <SPAN class=ps91><NOBR>请求<SPAN
class=em1>ID</SPAN>在<SPAN class=em1>CRCX</SPAN>指令中的匹配直</NOBR></SPAN> <SPAN
class=ps92><NOBR>观察事件:匹配拨号设计中一类数</NOBR></SPAN> <SPAN
class=ps93><NOBR>字映射的数字顺序</NOBR></SPAN> <SPAN class=ps94><NOBR><SPAN
class=ft5>文档</SPAN></NOBR></SPAN> </BODY></HTML>
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