Видео / аудио вызовы WebRTC не удались в 90% случаев в другой сети, но были успешными в 90% случаев в той же сети

Ниже представлена ​​моя бесплатная конфигурация сервера STUN / TUNE. Я получил ее по одной из ссылок на StackOverflow.

 var peerConnectionConfig = {
        iceServers: [{
                urls: ["turn:173.194.72.127:19305?transport=udp",
                    "turn:[2404:6800:4008:C01::7F]:19305?transport=udp",
                    "turn:173.194.72.127:443?transport=tcp",
                    "turn:[2404:6800:4008:C01::7F]:443?transport=tcp"
                ],
                username: "CKjCuLwFEgahxNRjuTAYzc/s6OMT",
                credential: "u1SQDR/SQsPQIxXNWQT7czc/G4c="
            },
            {
                urls: ["stun:stun.l.google.com:19302"]
            }
        ]
    };

Ниже мой код javascript webRTC

$(function() {
    var initiator,pc;
    var isSender = false;
    var peerConnectionConfig = {
        iceServers: [{
                urls: ["turn:173.194.XX.127:19305?transport=udp",
                    "turn:[2404:XXXX:XXXX:C01::7F]:19305?transport=udp",
                    "turn:173.194.XX.127:443?transport=tcp",
                    "turn:[2404:XXXX:XXXX:C01::7F]:443?transport=tcp"
                ],
                username: "XXXXXXXXXX",
                credential: "YYYYYYYYYYY"
            },
            {
                urls: ["stun:stun.l.google.com:19302"]
            }
        ]
    };
    $.ajax({
        type: "GET",
        url: '/isRoomExist/?roomName=121' ,
        beforeSend: function() {},
        success: function(data) {
            data = JSON.parse(data);
            initiatorCtrl(data[0].flgInitiator);
        }
    });
    var ws_scheme = window.location.protocol == "https:" ? "wss" : "ws";
    var chatsock = new ReconnectingWebSocket(ws_scheme + '://' + window.location.host + "/chat" + window.location.pathname);

    function initiatorCtrl(event) {
        if (event == "fullhouse") {
            alert("full house");
        }
        if (event == "initiator") {
            initiator = false;
            init();
        }
        if (event == "not initiator") {
            initiator = true;
            init();
        }
    }

    function init() {
        var constraints = {
            audio: true,
            video: true
        };
        getUserMedia(constraints, connect, fail);
    }

    function connect(stream) {
        pc = new RTCPeerConnection(peerConnectionConfig);

        if (stream) {
            pc.addStream(stream);
            $('#local').attachStream(stream);
        }

        pc.onaddstream = function(event) {
            $('#remote').attachStream(event.stream);
            logStreaming(true);
        };
        pc.onicecandidate = function(event) {
            if (event.candidate) {
                chatsock.send(JSON.stringify(event.candidate));
                isSender = true;
            }
        };
        if (initiator) {
            createOffer();
        } else {
            log('waiting for offer...');
        }
        logStreaming(false);

        chatsock.onmessage = function(event) {
            var signal1 = JSON.parse(event.data);
            var signal = JSON.parse(signal1);

            if (isSender) {
                isSender = false
            } else {
                if (signal.sdp) {
                    if (initiator) {
                        receiveAnswer(signal);
                    } else {
                        receiveOffer(signal);
                    }
                } else if (signal.candidate) {
                    pc.addIceCandidate(new RTCIceCandidate(signal));
                }
            }
        };
    }

    function createOffer() {
        pc.createOffer(function(offer) {
            pc.setLocalDescription(offer, function() {
                chatsock.send(JSON.stringify(offer));
                isSender = true;
            }, fail);
        }, fail);
    }

    function receiveOffer(offer) {
        pc.setRemoteDescription(new RTCSessionDescription(offer), function() {
            pc.createAnswer(function(answer) {
                pc.setLocalDescription(answer, function() {
                    chatsock.send(JSON.stringify(answer));
                    isSender = true;
                }, fail);
            }, fail);
        }, fail);
    }

    function receiveAnswer(answer) {
        pc.setRemoteDescription(new RTCSessionDescription(answer));
    }
    function log() {
        console.log(Array.prototype.join.call(arguments, ' '))
        console.log.apply(console, arguments);
    }
    function logStreaming(streaming) {
        $('#streaming').text(streaming ? '[streaming]' : '[..]');
    }
    function fail() {
        console.error.apply(console, arguments);
    }
    jQuery.fn.attachStream = function(stream) {
        this.each(function() {
            this.src = URL.createObjectURL(stream);
            this.play();
        });
    };


});