檢視数字程控交换机的原始碼

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|<center>'''数字程控交换机'''<br><img
src="https://ts1.cn.mm.bing.net/th/id/R-C.e5334e33d541ee313085bb93814ad1bb?rik=d1cZNO8aWqdAGg&riu=http%3a%2f%2fwww.zjhjtx.com%2fupload%2f20160827%2f201608270947005231.gif&ehk=AO66eV0Drp9%2bmllMYLRDU9as3rkFh0QQKsXUgDABT6Q%3d&risl=&pid=ImgRaw&r=0" width="280"></center><small>  圖片來自优酷</small> 
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'''用于电话交换网的交换设备'''

'''数字程控交换机'''通常专指用于电话交换网的交换设备，它以[[计算机程序]]控制电话的接续。数字程控交换机分为长途交换机，本地交换机等。另外还有专用于信令网和智能网的类型。 数字程控交换机的基本功

其中通话接续部分是利用交换机中的数字交换网络，采用PCM方式实现数字交换的，控制部分是通过软件由计算机来实现的。

*中文名:[[数字程控交换机]]

*功    能:用户线接入，中继接续，计费，设备管理等
{| class="https://cn.bing.com/images/search?view=detailV2&ccid=Zbg8dV5D&id=5727B508D86B171C1E7B27185AB11E9A91F44F5B&thid=OIP.Zbg8dV5DyjYBfCza6yAxDgHaFC&mediaurl=https%3a%2f%2fts1.cn.mm.bing.net%2fth%2fid%2fR-C.65b83c755e43ca36017c2cdaeb20310e%3frik%3dW0%252f0kZoesVoYJw%26riu%3dhttp%253a%252f%252fwww.cqshenou.com%252fedit%252fUploadFile%252f2013927165536600.jpg%26ehk%3dTXjR9fBgp5%252fOZ9h4F7PeryMlA8xl8VKs%252bvn5%252bquWUuA%253d%26risl%3d%26pid%3dImgRaw%26r%3d0&exph=578&expw=850&q=%e6%95%b0%e5%ad%97%e7%a8%8b%e6%8e%a7%e4%ba%a4%e6%8d%a2%e6%9c%ba&simid=608009409266796296&FORM=IRPRST&ck=6355F17CF5EBF701DF68370F856AA50C&selectedIndex=113&ajaxhist=0&ajaxserp=0" style="float:right; margin: -10px 0px 10px 20px; text-align:left"
|<center>'''数字程控交换机'''<br><img
src=" https://ts1.cn.mm.bing.net/th/id/R-C.65b83c755e43ca36017c2cdaeb20310e?rik=W0%2f0kZoesVoYJw&riu=http%3a%2f%2fwww.cqshenou.com%2fedit%2fUploadFile%2f2013927165536600.jpg&ehk=TXjR9fBgp5%2fOZ9h4F7PeryMlA8xl8VKs%2bvn5%2bquWUuA%3d&risl=&pid=ImgRaw&r=0" width="280"></center><small>  圖片來自优酷</small> 
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