handleDtmf function
Implementation
void handleDtmf(Channel channel, int digit) {
// var parts = ['sound:you-entered', "digits:${digit.toString()}"];
// var done = 0;
// cancelTimeout(channel);
var playback = client.playback();
//{media: 'sound:you-entered'},
channel.play(playback, (err, playback) {
// ignore errors
channel.play(playback, (err, playback) {
// ignore errors
playIntroMenu(channel);
}, media: ["digits:${digit.toString()}"]);
}, media: ['sound:you-entered']);
// playIntroMenu(channel);
}