ts-sdk-telephony-status.ts

let subscription = rc.createSubscription();
subscription.onMessage(msg => {
	let presenceEvt = msg.body;
	console.log('>> telephonyStatus', presenceEvt.telephonyStatus);
	console.log('>> activeCalls', presenceEvt.activeCalls);
	console.log('@@ presence event', presenceEvt);
});
subscription.subscribe(['/account/~/extension/~/presence?detailedTelephonyState=true'])
	.then(subscription => {
		console.log('Subscription created', subscription);
	}, e => {
		console.error('Fail to subscribe', e);
	});