incoming call management

[Aleks]

Hello.

I have a problem. I don't understand the logic of incoming calls. What methods from the documentation should I use at each step to make incoming calls work?

I'm connecting now _ua = new JsSIP.UA(

{

***

});

Start successfully 

this._ua.start();

Outgoing call works

function call(callid) {

    this.session = this._ua.call(number, {

        pcConfig:

        {

            hackStripTcp: true, 

            rtcpMuxPolicy: 'negotiate', 

            iceServers: []

        },

        'extraHeaders': [ 'X-CRM-ID : '+callid ],

        mediaConstraints:

        {

            audio: true, 

            video: false

        },

        rtcOfferConstraints:

        {

            offerToReceiveAudio: 1, 

            offerToReceiveVideo: 0

        }

    });

}

But the incoming call doesn't work.

Give me a roadmap of my actions for success please.