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📁 通讯类的标准。对要开发SS7的朋友有很大帮助的。（通讯协议）
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<BODY>
<DIV class=pg></DIV><!-- bitmap and vector images are written here -->
<DIV class=im0><IMG height=3 src="003_38.files/003_38_1.jpg" width=558 
border=0></DIV>
<DIV class=im1><IMG height=2 src="003_38.files/003_38_2.jpg" width=558 
border=0></DIV>
<DIV class=im2><IMG height=3 src="003_38.files/003_38_3.jpg" width=558 
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<DIV class=im3><IMG height=3 src="003_38.files/003_38_4.jpg" width=558 
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<DIV class=im4><IMG height=2 src="003_38.files/003_38_5.jpg" width=558 
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<DIV class=im6><IMG height=64 src="003_38.files/right.jpg" width=563 
border=0></DIV><!-- text starts here --><SPAN class=ps0><NOBR><SPAN 
class=ft0>间的<SPAN class=em0>RAS</SPAN>交换机的确切属性。例如，端点可能期望保持注册，或者已请求的脱离。在<SPAN 
class=em0>H.323</SPAN>挂</SPAN></NOBR></SPAN> <SPAN class=ps1><NOBR><SPAN 
class=ft0>机的例子中，从呼叫流的第<SPAN class=em0>3</SPAN>步开始，<SPAN 
class=em0>MGC</SPAN>可能已经删除了到<SPAN class=em0>MG</SPAN>端点的连接。</SPAN></NOBR></SPAN> 
<SPAN class=ps2><NOBR><SPAN class=ft1>3. SS7<SPAN class=em3>、</SPAN>Q.931<SPAN 
class=em3>和</SPAN>H.323<SPAN class=em3>信令间的参数转换</SPAN></SPAN></NOBR></SPAN> 
<SPAN class=ps3><NOBR><SPAN class=ft0>显然，各种信令协议的信息和参数之间的映射非常困难，必须认真考虑。表<SPAN 
class=em0>3-11</SPAN>中是<SPAN class=em0>SS7</SPAN></SPAN></NOBR></SPAN> <SPAN 
class=ps4><NOBR><SPAN class=ft0>信令参数和<SPAN class=em0>Q.931</SPAN>及<SPAN 
class=em0>H.225.0</SPAN>信令协议间的基本映射，同时有一些注释可以帮助读者理解其基</SPAN></NOBR></SPAN> <SPAN 
class=ps5><NOBR><SPAN 
class=ft0>本原理。在实际实现中，特别是支持跨越不相似信令域的多方会议的介质网关，可能会出现</SPAN></NOBR></SPAN> <SPAN 
class=ps6><NOBR><SPAN class=ft0>更复杂的映射。</SPAN></NOBR></SPAN> <SPAN 
class=ps7><NOBR><SPAN class=ft2>表<SPAN class=em4>3-11 
&nbsp;&nbsp;ISUP</SPAN>、<SPAN class=em4>Q.931</SPAN>和<SPAN 
class=em4>H.225.0</SPAN>间基本信息元的映射</SPAN></NOBR></SPAN> <SPAN 
class=ps8><NOBR><SPAN class=ft3>H.225 <SPAN 
class=em1>元件</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps9><NOBR><SPAN 
class=ft3>Q.931 <SPAN class=em1>信息元件</SPAN></SPAN></NOBR></SPAN> <SPAN 
class=ps10><NOBR><SPAN class=ft3>SS7 ISUP <SPAN 
class=em1>参数</SPAN></SPAN></NOBR></SPAN> <SPAN 
class=ps11><NOBR>载波容量</NOBR></SPAN> <SPAN class=ps12><NOBR>载波容量</NOBR></SPAN> 
<SPAN class=ps13><NOBR>用户服务信息</NOBR></SPAN> <SPAN 
class=ps14><NOBR>被叫方号码</NOBR></SPAN> <SPAN class=ps15><NOBR>被叫方号码</NOBR></SPAN> 
<SPAN class=ps16><NOBR>被叫方号码</NOBR></SPAN> <SPAN 
class=ps17><NOBR>被叫方子地址</NOBR></SPAN> <SPAN 
class=ps18><NOBR>被叫方子地址</NOBR></SPAN> <SPAN class=ps19><NOBR>访问传输</NOBR></SPAN> 
<SPAN class=ps20><NOBR>呼叫方号码</NOBR></SPAN> <SPAN 
class=ps21><NOBR>呼叫方号码</NOBR></SPAN> <SPAN class=ps22><NOBR>呼叫方号码</NOBR></SPAN> 
<SPAN class=ps23><NOBR>呼叫方子地址</NOBR></SPAN> <SPAN 
class=ps24><NOBR>呼叫方子地址</NOBR></SPAN> <SPAN class=ps25><NOBR>访问传输</NOBR></SPAN> 
<SPAN class=ps26><NOBR>原因</NOBR></SPAN> <SPAN class=ps27><NOBR>原因</NOBR></SPAN> 
<SPAN class=ps28><NOBR>原因指示器</NOBR></SPAN> <SPAN class=ps29><NOBR>日期<SPAN 
class=em5>/</SPAN>时间</NOBR></SPAN> <SPAN class=ps30><NOBR>日期<SPAN 
class=em5>/</SPAN>时间</NOBR></SPAN> <SPAN class=ps31><NOBR>（无映射）</NOBR></SPAN> 
<SPAN class=ps32><NOBR>显示器</NOBR></SPAN> <SPAN 
class=ps33><NOBR>显示器</NOBR></SPAN> <SPAN class=ps34><NOBR>（无映射）</NOBR></SPAN> 
<SPAN class=ps35><NOBR>扩展功能<SPAN class=em5>IE</SPAN></NOBR></SPAN> <SPAN 
class=ps36><NOBR>扩展功能<SPAN class=em5>IE<SPAN class=em1>（</SPAN></SPAN>无<SPAN 
class=em5>ANSI<SPAN class=em1>）</SPAN></SPAN></NOBR></SPAN> <SPAN 
class=ps37><NOBR>（无映射）</NOBR></SPAN> <SPAN class=ps38><NOBR><SPAN 
class=ft3>(<SPAN class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps39><NOBR>高层兼容性</NOBR></SPAN> <SPAN class=ps40><NOBR>访问传输</NOBR></SPAN> 
<SPAN class=ps41><NOBR>键盘功能</NOBR></SPAN> <SPAN 
class=ps42><NOBR>键盘功能</NOBR></SPAN> <SPAN class=ps43><NOBR>被叫方号码</NOBR></SPAN> 
<SPAN class=ps44><NOBR><SPAN class=ft3>(<SPAN 
class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps45><NOBR>低层兼容性</NOBR></SPAN> <SPAN class=ps46><NOBR>访问传输</NOBR></SPAN> 
<SPAN class=ps47><NOBR><SPAN class=ft3>(<SPAN 
class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps48><NOBR>更多数据</NOBR></SPAN> <SPAN class=ps49><NOBR>（无映射）</NOBR></SPAN> 
<SPAN class=ps50><NOBR><SPAN class=ft3>(<SPAN 
class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps51><NOBR>与网络相关的设备</NOBR></SPAN> <SPAN 
class=ps52><NOBR>（无映射）</NOBR></SPAN> <SPAN class=ps53><NOBR>通知指示器</NOBR></SPAN> 
<SPAN class=ps54><NOBR>通知指示器</NOBR></SPAN> <SPAN 
class=ps55><NOBR>通知指示器</NOBR></SPAN> <SPAN class=ps56><NOBR>进度指示器</NOBR></SPAN> 
<SPAN class=ps57><NOBR>进度指示器</NOBR></SPAN> <SPAN class=ps58><NOBR>访问传输<SPAN 
class=em5>/</SPAN>进度指示器</NOBR></SPAN> <SPAN class=ps59><NOBR>宽带<SPAN 
class=em5>ISUP</SPAN></NOBR></SPAN> <SPAN class=ps60><NOBR><SPAN 
class=ft3>(<SPAN class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps61><NOBR>重复指示器</NOBR></SPAN> <SPAN class=ps62><NOBR>（无映射）</NOBR></SPAN> 
<SPAN class=ps63><NOBR><SPAN class=ft3>(<SPAN 
class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps64><NOBR>重复指示器</NOBR></SPAN> <SPAN class=ps65><NOBR>（无映射）</NOBR></SPAN> 
<SPAN class=ps66><NOBR><SPAN class=ft3>(<SPAN 
class=em1>未使用</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps67><NOBR>分段消息</NOBR></SPAN> <SPAN class=ps68><NOBR><SPAN 
class=ft3>(<SPAN class=em1>仅</SPAN>BISUP)</SPAN></NOBR></SPAN> <SPAN 
class=ps69><NOBR>发送完成</NOBR></SPAN> <SPAN class=ps70><NOBR>发送完成</NOBR></SPAN> 
<SPAN class=ps71><NOBR>（无映射）</NOBR></SPAN> <SPAN 
class=ps72><NOBR>信号</NOBR></SPAN> <SPAN class=ps73><NOBR>信号</NOBR></SPAN> <SPAN 
class=ps74><NOBR>（无映射）</NOBR></SPAN> <SPAN class=ps75><NOBR>（未使用）</NOBR></SPAN> 
<SPAN class=ps76><NOBR>过渡网络选择</NOBR></SPAN> <SPAN 
class=ps77><NOBR>过渡网络选择</NOBR></SPAN> <SPAN class=ps78><NOBR>用户到用户</NOBR></SPAN> 
<SPAN class=ps79><NOBR>用户到用户</NOBR></SPAN> <SPAN class=ps80><NOBR>（无映射，仅<SPAN 
class=em5>BISUP<SPAN class=em1>）</SPAN></SPAN></NOBR></SPAN> <SPAN 
class=ps81><NOBR><SPAN class=ft0>表<SPAN class=em0>3-12</SPAN>中是<SPAN 
class=em0>ISUP IAM </SPAN>消息和<SPAN class=em0>Q.931 
SETUP</SPAN>之间的一个典型映射。虽然大多数信息可以通</SPAN></NOBR></SPAN> <SPAN 
class=ps82><NOBR><SPAN 
class=ft0>过网络映射和携带，但是两个信令协议不会有信息元的精确对应，这是由它们不同的性质、</SPAN></NOBR></SPAN> <SPAN 
class=ps83><NOBR><SPAN 
class=ft0>来源和信令目标决定的。这只是与协议映射和协作相关的问题的一个简单说明。随着</SPAN></NOBR></SPAN> <SPAN 
class=ps84><NOBR><SPAN class=ft1>VoIP<SPAN 
class=em6>信</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps85><NOBR><SPAN 
class=ft0>令协议的成熟以通过公用网提供主要的服务电话，服务平台间的协议协作仍然将是服务供应</SPAN></NOBR></SPAN> <SPAN 
class=ps86><NOBR><SPAN class=ft0>商的主要投资开发项目。</SPAN></NOBR></SPAN> <SPAN 
class=ps87><NOBR><SPAN class=ft2>表<SPAN class=em4>3-12 &nbsp;&nbsp;H.323<SPAN 
class=em2>（</SPAN>SETUP<SPAN class=em2>）</SPAN></SPAN>到<SPAN 
class=em4>SS7-ISUP<SPAN class=em2>（</SPAN>IAM<SPAN 
class=em2>）</SPAN></SPAN>的参数映射</SPAN></NOBR></SPAN> <SPAN class=ps88><NOBR><SPAN 
class=ft3>Q.931<SPAN class=em1>呼叫方</SPAN>(SETUP)</SPAN></NOBR></SPAN> <SPAN 
class=ps89><NOBR><SPAN class=ft3>SS7 ISUP (IAM)</SPAN></NOBR></SPAN> <SPAN 
class=ps90><NOBR>载波容量</NOBR></SPAN> <SPAN class=ps91><NOBR>用户服务信息</NOBR></SPAN> 
<SPAN class=ps92><NOBR>键盘（被叫方号码在相反方向）</NOBR></SPAN> <SPAN 
class=ps93><NOBR>被叫方号码</NOBR></SPAN> <SPAN class=ps94><NOBR>呼叫方号码</NOBR></SPAN> 
<SPAN class=ps95><NOBR>呼叫方号码和<SPAN class=em5>/</SPAN>或一般的地址</NOBR></SPAN> <SPAN 
class=ps96><NOBR>呼叫方子地址</NOBR></SPAN> <SPAN class=ps97><NOBR>访问传输</NOBR></SPAN> 
<SPAN class=ps98><NOBR><SPAN class=ft5>第<SPAN 
class=em7>3</SPAN>章&nbsp;语音电话的基本呼叫控制</SPAN></NOBR></SPAN> <SPAN 
class=ps99><NOBR><SPAN class=ft6>137</SPAN></NOBR></SPAN> <SPAN 
class=ps100><NOBR><SPAN class=ft7>文档</SPAN></NOBR></SPAN> </BODY></HTML>
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