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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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<META content="MSHTML 6.00.2600.0" name=GENERATOR></HEAD>
<BODY>
<DIV class=pg></DIV><!-- bitmap and vector images are written here -->
<DIV class=im0><IMG height=3 src="003_14.files/003_14_1.jpg" width=558 
border=0></DIV>
<DIV class=im1><IMG height=2 src="003_14.files/003_14_2.jpg" width=558 
border=0></DIV>
<DIV class=im2><IMG height=3 src="003_14.files/003_14_3.jpg" width=558 
border=0></DIV>
<DIV class=im3><IMG height=64 src="003_14.files/right.jpg" width=563 
border=0></DIV><!-- text starts here --><SPAN class=ps0><NOBR><SPAN 
class=ft0>(<SPAN class=em1>续</SPAN>)</SPAN></NOBR></SPAN> <SPAN 
class=ps1><NOBR><SPAN class=ft1>Q.931</SPAN></NOBR></SPAN> <SPAN 
class=ps2><NOBR><SPAN class=ft2>意</SPAN></NOBR></SPAN> <SPAN 
class=ps3><NOBR><SPAN class=ft2>义</SPAN></NOBR></SPAN> <SPAN 
class=ps4><NOBR><SPAN class=ft2>备</SPAN></NOBR></SPAN> <SPAN 
class=ps5><NOBR><SPAN class=ft2>注</SPAN></NOBR></SPAN> <SPAN 
class=ps6><NOBR><SPAN class=ft2>电路模式消息编码</SPAN></NOBR></SPAN> <SPAN 
class=ps7><NOBR><SPAN class=ft1>PROGRESS</SPAN></NOBR></SPAN> <SPAN 
class=ps8><NOBR><SPAN class=ft1>SETUP</SPAN></NOBR></SPAN> <SPAN 
class=ps9><NOBR><SPAN class=ft1>SETUP </SPAN></NOBR></SPAN><SPAN 
class=ps10><NOBR><SPAN class=ft1>ACKNOWLEDGE</SPAN></NOBR></SPAN> <SPAN 
class=ps11><NOBR><SPAN class=ft1>RESUME</SPAN></NOBR></SPAN> <SPAN 
class=ps12><NOBR><SPAN class=ft1>RESUME </SPAN></NOBR></SPAN><SPAN 
class=ps13><NOBR><SPAN class=ft1>ACKNOWLEDGE</SPAN></NOBR></SPAN> <SPAN 
class=ps14><NOBR><SPAN class=ft1>RESUME </SPAN></NOBR></SPAN><SPAN 
class=ps15><NOBR><SPAN class=ft1>REJECT</SPAN></NOBR></SPAN> <SPAN 
class=ps16><NOBR><SPAN class=ft1>SUSPEND</SPAN></NOBR></SPAN> <SPAN 
class=ps17><NOBR><SPAN class=ft1>SUSPEND </SPAN></NOBR></SPAN><SPAN 
class=ps18><NOBR><SPAN class=ft1>ACKNOWLEDGE</SPAN></NOBR></SPAN> <SPAN 
class=ps19><NOBR><SPAN class=ft1>SUSPEND </SPAN></NOBR></SPAN><SPAN 
class=ps20><NOBR><SPAN class=ft1>REJECT</SPAN></NOBR></SPAN> <SPAN 
class=ps21><NOBR><SPAN class=ft1>USER </SPAN></NOBR></SPAN><SPAN 
class=ps22><NOBR><SPAN class=ft1>INFORMATION</SPAN></NOBR></SPAN> <SPAN 
class=ps23><NOBR><SPAN class=ft1>DISCONNECT</SPAN></NOBR></SPAN> <SPAN 
class=ps24><NOBR><SPAN class=ft1>RELEASE</SPAN></NOBR></SPAN> <SPAN 
class=ps25><NOBR><SPAN class=ft1>RELEASE </SPAN></NOBR></SPAN><SPAN 
class=ps26><NOBR><SPAN class=ft1>COMPLETE</SPAN></NOBR></SPAN> <SPAN 
class=ps27><NOBR><SPAN class=ft1>Q.931<SPAN 
class=em0>消息</SPAN></SPAN></NOBR></SPAN> <SPAN class=ps28><NOBR><SPAN 
class=ft1>CONGESTION </SPAN></NOBR></SPAN><SPAN class=ps29><NOBR><SPAN 
class=ft1>CONTROL</SPAN></NOBR></SPAN> <SPAN class=ps30><NOBR><SPAN 
class=ft1>INFORMATION</SPAN></NOBR></SPAN> <SPAN class=ps31><NOBR><SPAN 
class=ft1>NOTIFY</SPAN></NOBR></SPAN> <SPAN class=ps32><NOBR><SPAN 
class=ft1>STATUS</SPAN></NOBR></SPAN> <SPAN class=ps33><NOBR><SPAN 
class=ft1>STATUS </SPAN></NOBR></SPAN><SPAN class=ps34><NOBR><SPAN 
class=ft1>ENQUIRY</SPAN></NOBR></SPAN> <SPAN class=ps35><NOBR><SPAN 
class=ft3>第<SPAN class=em2>3</SPAN>章&nbsp;语音电话的基本呼叫控制</SPAN></NOBR></SPAN> <SPAN 
class=ps36><NOBR><SPAN class=ft4>113</SPAN></NOBR></SPAN> <SPAN 
class=ps37><NOBR><SPAN class=ft5>文档</SPAN></NOBR></SPAN> <SPAN 
class=ps38><NOBR>这条消息可以可选地传达关</NOBR></SPAN> <SPAN 
class=ps39><NOBR>于连接尝试失败原因等信息</NOBR></SPAN> <SPAN 
class=ps40><NOBR>从端点发送到起始本地交换</NOBR></SPAN> <SPAN 
class=ps41><NOBR>机。产生一个发向终止交换机</NOBR></SPAN> <SPAN class=ps42><NOBR>的<SPAN 
class=em3>IAM</SPAN>消息。全局有效</NOBR></SPAN> <SPAN class=ps43><NOBR>确认交换机已经收到<SPAN 
class=em3>SETUP</SPAN></NOBR></SPAN> <SPAN 
class=ps44><NOBR>消息，在呼叫处理中没有其他</NOBR></SPAN> <SPAN 
class=ps45><NOBR>意义。局部有效</NOBR></SPAN> <SPAN class=ps46><NOBR>适用于以前被<SPAN 
class=em3>SUSPEND</SPAN>消</NOBR></SPAN> <SPAN 
class=ps47><NOBR>息挂起的呼叫</NOBR></SPAN> <SPAN 
class=ps48><NOBR>已经恢复呼叫。挂起的呼叫</NOBR></SPAN> <SPAN 
class=ps49><NOBR>并没有终止</NOBR></SPAN> <SPAN class=ps50><NOBR>终止呼叫</NOBR></SPAN> 
<SPAN class=ps51><NOBR>这些都是用户和本地交换机</NOBR></SPAN> <SPAN 
class=ps52><NOBR>之间的局部消息</NOBR></SPAN> <SPAN 
class=ps53><NOBR>与呼叫建立无关</NOBR></SPAN> <SPAN 
class=ps54><NOBR>在呼叫终止点，接收交换机</NOBR></SPAN> <SPAN class=ps55><NOBR>发送<SPAN 
class=em3>RELEASE<SPAN class=em0>，</SPAN></SPAN>本地交换机发</NOBR></SPAN> <SPAN 
class=ps56><NOBR>送<SPAN class=em3>D I S C O N N E C T</SPAN>来应答</NOBR></SPAN> 
<SPAN class=ps57><NOBR><SPAN class=ft7>RELEASE COMPLETE</SPAN></NOBR></SPAN> 
<SPAN class=ps58><NOBR>由网络或用户产生</NOBR></SPAN> <SPAN 
class=ps59><NOBR>局部消息，从网络到用户，指</NOBR></SPAN> <SPAN class=ps60><NOBR>出呼叫是否是<SPAN 
class=em4>I&nbsp;S&nbsp;D&nbsp;N</SPAN>端到端的，</NOBR></SPAN> <SPAN 
class=ps61><NOBR>或者有一个端点是<SPAN 
class=em4>I&nbsp;S&nbsp;D&nbsp;N</SPAN>设备。</NOBR></SPAN> <SPAN 
class=ps62><NOBR>它还说明<SPAN class=em3>B</SPAN>信道中出现音调</NOBR></SPAN> <SPAN 
class=ps63><NOBR>从呼叫方发送到本地交换机，</NOBR></SPAN> <SPAN 
class=ps64><NOBR>开始呼叫建立过程</NOBR></SPAN> <SPAN class=ps65><NOBR>确认局部有效的<SPAN 
class=em3>SETUP</SPAN>消息</NOBR></SPAN> <SPAN 
class=ps66><NOBR>从用户发送到交换机，请求恢</NOBR></SPAN> <SPAN 
class=ps67><NOBR>复一个挂起的呼叫</NOBR></SPAN> <SPAN 
class=ps68><NOBR>局部有效，确认</NOBR></SPAN> <SPAN class=ps69><NOBR><SPAN class=ft7>R 
E S U M E</SPAN></NOBR></SPAN> <SPAN class=ps70><NOBR>消息</NOBR></SPAN> <SPAN 
class=ps71><NOBR>交换机在恢复挂起请求时失效</NOBR></SPAN> <SPAN 
class=ps72><NOBR>用户通过短时间挂机要求暂时</NOBR></SPAN> <SPAN 
class=ps73><NOBR>挂起呼叫</NOBR></SPAN> <SPAN 
class=ps74><NOBR>本地交换机收到挂起请求</NOBR></SPAN> <SPAN 
class=ps75><NOBR>本地交换机拒绝挂起请求</NOBR></SPAN> <SPAN 
class=ps76><NOBR>这条消息在两个用户之间传送</NOBR></SPAN> <SPAN 
class=ps77><NOBR>信息</NOBR></SPAN> <SPAN 
class=ps78><NOBR>呼叫中的任何一方都可以通过</NOBR></SPAN> <SPAN 
class=ps79><NOBR>挂起呼叫来产生该消息。全局有</NOBR></SPAN> <SPAN 
class=ps80><NOBR>效，由用户发送到网络或者由网</NOBR></SPAN> <SPAN 
class=ps81><NOBR>络发送给用户</NOBR></SPAN> <SPAN class=ps82><NOBR>表示收到<SPAN 
class=em3>DISCONNECT</SPAN>消息，</NOBR></SPAN> <SPAN 
class=ps83><NOBR>或者由于其他原因导致用户或网</NOBR></SPAN> <SPAN 
class=ps84><NOBR>络释放电路。局部有效</NOBR></SPAN> <SPAN class=ps85><NOBR>表示收到<SPAN 
class=em3>RELEASE</SPAN>消息。局</NOBR></SPAN> <SPAN 
class=ps86><NOBR>部有效</NOBR></SPAN> <SPAN class=ps87><NOBR>在<SPAN class=em3>USER 
INFORMATION</SPAN>消息</NOBR></SPAN> <SPAN 
class=ps88><NOBR>中设置和释放流控制，局部有效</NOBR></SPAN> <SPAN 
class=ps89><NOBR>提供与呼叫建立有关的其他信</NOBR></SPAN> <SPAN 
class=ps90><NOBR>息，局部有效</NOBR></SPAN> <SPAN 
class=ps91><NOBR>传送正在进行的呼叫的信息</NOBR></SPAN> <SPAN class=ps92><NOBR>应答<SPAN 
class=em3>STATUS ENQUIRY</SPAN>指令</NOBR></SPAN> <SPAN 
class=ps93><NOBR>得到呼叫状态，局部有效</NOBR></SPAN> <SPAN 
class=ps94><NOBR>由网络或者用户产生</NOBR></SPAN> <SPAN 
class=ps95><NOBR>由网络或者用户产生</NOBR></SPAN> <SPAN 
class=ps96><NOBR>由网络或者用户产生</NOBR></SPAN> <SPAN class=ps97><NOBR>在收到<SPAN 
class=em3>STATUS ENQUIRY</SPAN>时</NOBR></SPAN> <SPAN 
class=ps98><NOBR>必须使用这条应答消息</NOBR></SPAN> <SPAN 
class=ps99><NOBR>由网络或者用户产生</NOBR></SPAN> </BODY></HTML>
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