WIP: NMT docs

docs/index.html

@@ -23,6 +23,7 @@ A base station emulator for classic mobile networks. All these networks use anal
 	<li><a href="headset.html">Connecting headset</a></li>
 	<li><a href="a-netz.html">Using A-Netz phone</a></li>
 	<li><a href="b-netz.html">Using B-Netz phone</a></li>
+	<li><a href="nmt.html">Using NMT phone</a></li>
 </ul>
 </center>