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| <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>5.3. HM780 IP中转 接入 MMDVM</title><link rel="stylesheet" type="text/css" href="docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><meta name="keywords" content="Amateur Radio, ham, ham radio, icom, yaesu, kenwood,, cw,ssb,usb,lsb,am,fm,rtty,fsk,afsk,psk31, fdma,tdma,cdma, dmr,c4fm" /><link rel="home" href="index.html" title="Netkiller Amateur Radio 手札" /><link rel="up" href="hytera.html" title="第 5 章 Hytera 海能达" /><link rel="prev" href="ch05s02.html" title="5.2. Hytera 海能达 HM7780 IP中转" /><link rel="next" href="mmdvm.html" title="第 6 章 MMDVM (Multi-Mode Digital Voice Modem)" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> | <a xmlns="" href="//netkiller.github.io/">简体中文</a> | <a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> | <a xmlns="" href="/journal/index.html">杂文</a> | ||
| | <a xmlns="" href="https://github.com/netkiller">Github</a> | <a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> | <a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> | <a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> | <a xmlns="" href="https://www.youtube.com/user/bg7nyt/videos">Youtube</a> | <a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> | <a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">5.3. HM780 IP中转 接入 MMDVM</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch05s02.html">上一页</a> </td><th width="60%" align="center">第 5 章 Hytera 海能达</th><td width="20%" align="right"> <a accesskey="n" href="mmdvm.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a></td><td></td><td></td><td></td><td></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="HM780-IP-MMDVM"></a>5.3. HM780 IP中转 接入 MMDVM</h2></div></div></div> | ||
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| <p>HM780 IP中转，可以实现多地，跨地域互联，IP中转是一个私有网络，我们希望把它接入到 MMDVM，于是想到使用 MMDVM 热点，完成我们想法。</p> | ||
| <div><img src="images/Hytera/HM780/mmdvm/mmdvm.jpg" /></div> | ||
| <p>实验把本地从机与远程主机互联，本地电台与 MMDVM 设置相同频率，色码，时隙，通话组，你可以理解为，HM780 就是用个用户手持电台的场景。</p> | ||
| <p>远程IP中转过来的信号，从HM780发射出去，此时MMDVM接收，通过网络送到 BM 服务器，MMVDM 静态组上的用户都可以超收。</p> | ||
| <p>MMDVM 上的用户语音通过热点发射 HM780 接收，并且通过 IP中转 送到远程主机，远程主机再下发到其他从站。</p> | ||
| <p>至此，HM780 IP中转与 MMDVM 实现互通。</p> | ||
| <p>----- 分割线 -----</p> | ||
| <p>本地手台发射，HM780和MMDVM同时接收，HM780 通过IP中转把语音传给远程主机，MMDVM把语音送到 BM通话组。远程主机发射，远程手台接收。</p> | ||
| <p>远程手台发射，远程HM780 接收，再通过IP中转送到，本地 HM780 发射，此时 MMDVM和手台同时接收。手台听到对面手台的语音，同时 MMDVM 把远程语音送到 BM 通话组。</p> | ||
| <p>至此，两端移动终端手台，实现了互通，并且接入到了 MMDVM。</p> | ||
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