var subscription = rcsdk.getSubscription();

subscription.on(subscription.events.notification, function(msg) {

console.log(msg.body.activeCalls[n].from);

// activeCalls is array

console.log(msg.body.activeCalls[n].to);

})

.register({

events: ['/account/~/extension/~/presence?detailedTelephonyState=true'],

})

.then(function(response) {

console.log('Success: Subscription is listening');

}).catch(function(e) {

alert('Subscription Error: ' + e.message);

});

Using This code for that