1、首先粘贴前端代码，里面引用的jssip的js可以从以下 链接下载jssip下载 
网上的许多demo无法使用，下面是从网上找得demo后，做了更改的前端代码（亲测可用）：
<!DOCTYPE html>
<html>
<head>
<title>JsSIP + WebRTC + freeSWITCH</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="Author" content="foruok" />
<meta name="description" content="JsSIP based example web application." />
<!--<script src="./js/jssip-3.3.11.min.js" type="text/javascript"></script>-->
<script src="./js/jssip-3.3.11.js" type="text/javascript"></script>
<style type="text/css">
</style>
</head>
<style type="text/css">
/* 遮罩层 */
#overlay {
position: fixed;
left: 0px;
top: 0px;
width: 100%;
height: 100%;
font-size: 16px;
/* IE9以下不支持rgba模式 */
background-color: rgba(0, 0, 0, 0.5);
/* 兼容IE8及以下 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#7f000000,endColorstr=#7f000000);
display: none;
}
/* 弹出框主体 */
.popup {
background-color: #ffffff;
max-width: 400px;
min-width: 200px;
height: 240px;
border-radius: 5px;
margin: 100px auto;
text-align: center;
}
/* 弹出框的标题 */
.popup_title {
height: 60px;
line-height: 60px;
border-bottom: solid 1px #cccccc;
}
/* 弹出框的内容 */
.popup_content {
height: 50px;
line-height: 50px;
padding: 15px 20px;
}
/* 弹出框的按钮栏 */
.popup_btn {
padding-bottom: 10px;
}
/* 弹出框的按钮 */
.popup_btn button {
color: #778899;
width: 40%;
height: 40px;
cursor: pointer;
border: solid 1px #cccccc;
border-radius: 5px;
margin: 5px 10px;
color: #ffffff;
background-color: #337ab7;
}
</style>
<body>
<div id="login-page" style="width: 424px; height: 260px; background-color: #f2f4f4; border: 1px solid grey; padding-top: 4px">
<table border="0" frame="void" width="418px">
<tr>
<td class="td_label" width="160px" align="right"><label for="sip_uri">SIP URI:</label></td>
<td width="258px"><input style="width:250px" id="sip_uri" type="text" placeholder="SIP URI (i.e: sip:alice@example.com)" /></td>
</tr>
<tr>
<td class="td_label" align="right"><label for="sip_password">SIP Password:</label></td>
<td><input style="width:250px" id="sip_password" type="password" placeholder="SIP password" /></td>
</tr>
<tr>
<td class="td_label" align="right"><label for="ws_uri">WSS URI:</label></td>
<td><input style="width:250px" id="ws_uri" class="last unset" type="text" placeholder="WSS URI (i.e: wss://example.com)" /></td>
</tr>
<tr>
<td class="td_label" align="right"><label class="input_label" for="sip_phone_number">SIP Phone Info:</label></td>
<td><input style="width:250px" id="sip_phone_number" type="text" placeholder="sip:3000@192.168.40.96:5060" ></td>
</tr>
<tr>
<td colspan="2" align="center"><button onclick="testStart()"> 注册初始化 </button></td>
</tr>
<tr>
<td colspan="2" align="center"><button onclick="testCall()"> 拨号 </button></td>
</tr>
<tr>
<td colspan="2" align="center"><button onclick="testCallByVedio()"> 视频拨号 </button></td>
</tr>
<tr>
<td colspan="2" align="center"><button onclick="testHangup()"> 挂断 </button></td>
</tr>
<!--<tr>
<td colspan="2" align="center"><button onclick="unReg()"> 取消注册 </button></td>
</tr>-->
<tr>
<td colspan="2" align="center"><button onclick="captureLocalMedia()"> 获取本地媒体设备（测试本地设备是否正常） </button></td>
</tr>
</table>
</div>
<!--<div style="width: 300px; height: 200px;background-color: #333333; border: 2px solid blue; padding:0px; margin-top: 4px;">
<video id="video" width="300px" height="200px" autoplay ></video>
<p>本地摄像头</p>
<video style="background-color: #333333; border: 2px solid blue; padding:0px; margin-top: 4px;" id="my-video" width="120px" height="80px" autoplay> </video>
</br>
<!--<p>音频</p><audio id="audio" controls></audio>-->
<!--<audio id="audio"></audio>
</div>-->
<div>
<p>音频</p>
<audio id="audio" autoplay></audio>
</div>
<div style="padding-top:10px;padding-bottom:10px;font-weight:bold;">视频展示区</div>
<div style="padding-top:10px;" align="left">
<table border="0">
<tr>
<video id="meVideo" style="padding-right:10px"></video>
<video id="remoteVideo" style="background-color: #333333; border: 2px solid blue;" ></video>
</tr>
</table>
</div>
<!--<div id="overlay">
<div class="popup">
<p class="popup_title" id="p_title"></p>
<p class="popup_content" id="p_content"></p>
<div class="popup_btn">
<button class="cancelBtn" onclick="hidePopup()">取消</button>
<button class="confirmBtn" onclick="hidePopup()">确认</button>
</div>
</div>
</div>-->
</body>
<script type="text/javascript">
var outgoingSession = null;
var incomingSession = null;
var currentSession = null;
var audio = document.getElementById('audio');
//var video = document.getElementById('video');
//var myVideo=document.getElementById('my-video');
var meVideo = document.getElementById('meVideo');
meVideo.setAttribute('autoplay', '');
//meVideo.setAttribute('muted', '');
meVideo.setAttribute('playsinline', '');
meVideo.style.width = '360px';
var youVideo = document.getElementById('remoteVideo');
youVideo.setAttribute('autoplay', '');
//meVideo.setAttribute('muted', '');
youVideo.setAttribute('playsinline', '');
youVideo.style.width = '360px';
var myHangup=false;
var constraints = {
audio: true,
video: true,
mandatory: {
maxWidth: 640,
maxHeight: 360
}
};
URL = window.URL || window.webkitURL;
var localStream = null;
var userAgent = null;
function gotLocalMedia(stream) {
console.info('Received local media stream');
localStream = stream;
//audio.src = URL.createObjectURL(stream);
//连接本地麦克风
try {
audio.srcObject = stream;
} catch (error) {
audio.src = window.URL.createObjectURL(stream);
}
//屏幕连接本地摄像头
try {
meVideo.srcObject = stream;
} catch (error) {
meVideo.src = window.URL.createObjectURL(stream);
}
}
function captureLocalMedia() {
console.info('Requesting local video & audio');
navigator.webkitGetUserMedia(constraints, gotLocalMedia, function(e){
alert('getUserMedia() error: ' + e.name);
});
}
function showVedio(){
navigator.mediaDevices.getUserMedia(constraints).then(function success(stream) {
meVideo.srcObject = stream;
document.body.addEventListener('click', function() {
meVideo.play();
});
// wait until the video stream is ready
var interval = setInterval(function(){
if(!meVideo.videoWidth){
return;
}
//stage.appendChild(videoView);
clearInterval(interval);
}, 1000 / 50);
}).catch(function(error){
onError({
name: error.name,
message: error.message
});
});
}
function testStart(){
var sip_uri_ = document.getElementById("sip_uri").value.toString();
var sip_password_ = document.getElementById("sip_password").value.toString();
var ws_uri_ = document.getElementById("ws_uri").value.toString();
console.info("get input info: sip_uri = ", sip_uri_, " sip_password = ", sip_password_, " ws_uri = ", ws_uri_);
var socket = new JsSIP.WebSocketInterface(ws_uri_);
var configuration = {
sockets: [ socket ],
outbound_proxy_set: ws_uri_,
uri: sip_uri_,//与用户代理关联的SIP URI（字符串）。这是您的提供商提供给您的SIP地址
password: sip_password_,//SIP身份验证密码
register: true,//指示启动时JsSIP用户代理是否应自动注册
session_timers: false//启用会话计时器（根据RFC 4028）
};
userAgent = new JsSIP.UA(configuration);
//成功注册成功,data:Response JsSIP.IncomingResponse收到的SIP 2XX响应的实例
userAgent.on('registered', function(data){
console.info("registered: ", data.response.status_code, ",", data.response.reason_phrase);
});
//由于注册失败而被解雇,data:Response JsSIP.IncomingResponse接收到的SIP否定响应的实例，如果失败是由这样的响应的接收产生的，否则为空
userAgent.on('registrationFailed', function(data){
console.log("registrationFailed, ", data);
//console.warn("registrationFailed, ", data.response.status_code, ",", data.response.reason_phrase, " cause - ", data.cause);
});
//1.在注册到期之前发射几秒钟。如果应用程序没有为这个事件设置任何监听器，JsSIP将像往常一样重新注册。
// 2.如果应用程序订阅了这个事件，它负责ua.register()在registrationExpiring事件中调用（否则注册将过期）。
// 3.此事件使应用程序有机会在重新注册之前执行异步操作。对于那些在REGISTER请求中的自定义SIP头中使用外部获得的“令牌”的环境很有用。
userAgent.on('registrationExpiring', function(){
console.warn("registrationExpiring");
});
//为传入或传出会话/呼叫激发。data:
// originator：'remote',新消息由远程对等方生成；'local',新消息由本地用户生成。
// session:JsSIP.RTCSession 实例。
// request:JsSIP.IncomingRequest收到的MESSAGE请求的实例；JsSIP.OutgoingRequest传出MESSAGE请求的实例
userAgent.on('newRTCSession', function(data){
console.info('onNewRTCSession: ', data);
if(data.originator == 'remote'){ //incoming call
console.info("incomingSession, answer the call");
incomingSession = data.session;
//回答传入会话。此方法仅适用于传入会话。
sipEventBind(data);
}else{
//打电话
console.info("outgoingSession");
outgoingSession = data.session;
//监听远程的音频流
outgoingSession.connection.addEventListener("addstream", function (ev) {
console.info('out onaddstream from remote - ', ev.stream);
//audio.srcObject = ev.stream;
//showVedio();
youVideo.srcObject = ev.stream;
});
outgoingSession.on('connecting', function(data){
console.info('onConnecting - ', data.request);
currentSession = outgoingSession;
outgoingSession = null;
});
}
});
//为传入或传出消息请求激发。data:
// originator：'remote',新消息由远程对等方生成；'local',新消息由本地用户生成。
// message:JsSIP.Message 实例。
// request:JsSIP.IncomingRequest收到的MESSAGE请求的实例；JsSIP.OutgoingRequest传出MESSAGE请求的实例
userAgent.on('newMessage', function(data){
if(data.originator == 'local'){
console.info('onNewMessage , OutgoingRequest - ', data.request);
}else{
console.info('onNewMessage , IncomingRequest - ', data.request);
}
});
console.info("call register");
//连接到信令服务器，并恢复以前的状态，如果以前停止。重新开始时，如果UA配置中的参数设置为register:true，则向SIP域注册。
userAgent.start();
}
function sipEventBind(remotedata, callbacks){
//接受呼叫时激发
remotedata.session.on('accepted', function(){
console.info('onAccepted - ', remotedata);
if(remotedata.originator == 'remote' && currentSession == null){
currentSession = incomingSession;
incomingSession = null;
console.info("setCurrentSession - ", currentSession);
}
});
//在将远程SDP传递到RTC引擎之前以及在发送本地SDP之前激发。此事件提供了修改传入和传出SDP的机制。
remotedata.session.on('sdp', function(data){
console.info('onSDP, type - ', data.type, ' sdp - ', data.sdp);
// data.sdp = data.sdp.replace('UDP/TLS/RTP/SAVPF', 'UDP/RTP/AVPF');
//console.info('onSDP, changed sdp - ', data.sdp);
});
//接收或生成对邀请请求的1XX SIP类响应（>100）时激发。该事件在SDP处理之前触发（如果存在），以便在需要时对其进行微调，甚至通过删除数据对象中响应参数的主体来删除它
remotedata.session.on('progress', function(){
console.info('onProgress - ', remotedata.originator);
if(remotedata.originator == 'remote'){
console.info('onProgress, response - ', remotedata.response);
//answer设置的自动接听
//RTCSession 的 answer 方法做了自动接听。实际开发中，你需要弹出一个提示框，让用户选择是否接听
var flag=confirm("是否接听?");
if(!flag){
userAgent.terminateSessions();
return;
}
//如果同一电脑两个浏览器测试则video改为false,这样被呼叫端可以看到视频，两台电脑测试让双方都看到改为true
remotedata.session.answer({'mediaConstraints' : { 'audio': true, 'video': true },
'mediaStream': localStream
});
}
});
//创建基础RTCPeerConnection后激发。应用程序有机会通过在peerconnection上添加RTCDataChannel或设置相应的事件侦听器来更改peerconnection。
remotedata.session.on('peerconnection', function(){
console.info('onPeerconnection - ', remotedata.peerconnection);
if(remotedata.originator == 'remote' && currentSession == null){
//拿到远程的音频流
remotedata.session.connection.addEventListener("addstream", function (ev) {
console.info('in onaddstream from remote - ', ev.stream);
//audio.srcObject = ev.stream;
//showVedio();
youVideo.srcObject = ev.stream;
});
}
});
//确认呼叫后激发
remotedata.session.on('confirmed', function(){
console.info('onConfirmed - ', remotedata);
if(remotedata.originator == 'remote' && currentSession == null){
currentSession = incomingSession;
incomingSession = null;
console.info("setCurrentSession - ", currentSession);
}
});
// 挂断处理
remotedata.session.on("ended", function(){
var stream1 = audio.srcObject;
if(stream1 != undefined){
var tracks = stream1.getTracks();
if(tracks != undefined){
tracks.forEach(track => {
track.stop();
});
}
}
if(myHangup){
myHangup=false;
alert("通话结束");
}else{
confirm("对方已挂断!");
}
console.log('call ended with cause: ' + remotedata.cause);
});
}
// Register callbacks to desired call events
var eventHandlers = {
'progress': function(e) {
console.log('call is in progress');
},
'failed': function(e) {
console.log('call failed: ', e);
},
'ended': function(e) {
console.log('call ended : ', e);
},
'confirmed': function(e) {
console.log('call confirmed');
}
};
function testCall(){
var sip_phone_number_ = document.getElementById("sip_phone_number").value.toString();
var options = {
'eventHandlers' : eventHandlers,
'mediaConstraints' : { 'audio': true, 'video': false }
// 'sessionTimersExpires': 120,
// 'mediaStream': localStream
// ,'pcConfig': {
// 'iceServers': [
// {
// 'urls': ['stun:stun.l.google.com:19302','stun:stun.counterpath.net:3478','stun:numb.viagenie.ca:3478']
// }
// ]
// },
};
//outgoingSession = userAgent.call('sip:3000@192.168.40.96:5060', options);
/*
* 拨打多媒体电话。不需要自己调用 getUserMedia 来捕获音视频了， JsSIP 会根据你传给JsSIP.UA.call方法的参数来自己调用
参数
Target 通话的目的地。String表示目标用户名或完整的SIP URI或JsSIP.URI实例。
Options 可选Object附加参数（见下文）。
options对象中的字段；
mediaConstraints Object有两个有效的字段（audio和video）指示会话是否打算使用音频和/或视频以及要使用的约束。默认值是audio并且video设置为true。
mediaStream MediaStream 传送到另一端。
eventHandlers Object事件处理程序的可选项将被注册到每个呼叫事件。为每个要通知的事件定义事件处理程序。
*/
outgoingSession = userAgent.call(sip_phone_number_, options);
}
function testCallByVedio(){
var sip_phone_number_ = document.getElementById("sip_phone_number").value.toString();
var options = {
'eventHandlers' : eventHandlers,
'mediaConstraints' : { 'audio': true, 'video': true }
// ,'sessionTimersExpires': 120
// ,'mediaStream': localStream
// ,'pcConfig': {
// 'iceServers': [
// {
// 'urls': ['stun:stun.l.google.com:19302','stun:stun.counterpath.net:3478','stun:numb.viagenie.ca:3478']
// }
// ]
// },
};
outgoingSession = userAgent.call(sip_phone_number_, options);
}
//挂断电话
function testHangup(){
myHangup=true;
outgoingSession = userAgent.terminateSessions();
var videoSrcObject = meVideo.srcObject;
if(videoSrcObject){
var tracks=videoSrcObject.getTracks();
for(var i = 0 ; i< tracks.length ; i++)
{
tracks[i].stop();
}
}
}
// 取消注册
function unReg() {
console.log('unregister----------->')
userAgent.unregister(true)
}
//自定义弹框,未完善，暂时不用
/** function showPopup(){
var overlay = document.getElementById("overlay");
overlay.style.display = "block";
return true;
}
function hidePopup(){
var overlay = document.getElementById("overlay");
overlay.style.display = "none";
return false;
}
function promptMessage(title,msg){
document.getElementById("p_title").innerHTML=title;
document.getElementById("p_content").innerHTML=msg;
showPopup();
} */
</script>
</html>2、freeswitch的安装配置这里不做说明，下面是使用freeswitch通话时遇到的问题
（1）返回状态码488的问题：
在freeswitch配置文件sip_profiles/internal.xml中添加如下内容:
<param name="apply-candidate-acl" value="rfc1918.auto"/>
<param name="apply-candidate-acl" value="wan.auto"/>
（2）前端的html页面要放到https下，否则webrtc获取不到本地ip地址，从发送的sdp信令a=candidate中可以看到ip是mdns生成的类似xxx.local的uuidipv4的东西（应该是谷歌的安全策略搞得），freewitch无法将语音送达，返回488
（3）使用网页拨打MicroSiP电话时拨打不通，可能是音频编码问题；也许我的协商设置有问题，与网页端协商的OPUS编码，与MicroSiP协商的PCMU编码，没有协商成功，也没转码。这里我采用修改freeswitch的vars.xml配置文件的编码格式为（注：这里的<X-PRE-PROCESS使用<!-- -->方式是注释不了的，可以破坏这个标签，如<X-PRE-PROCESSbak）：
<X-PRE-PROCESS cmd="set" data="global_codec_prefs=PCMU,H263-1998,H263,H264,VP8"/>
<X-PRE-PROCESS cmd="set" data="outbound_codec_prefs=PCMU,H263-1998,H263,H264,VP8"/>
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