How to gather the key from Answering side using Twilio TwiML?

How to gather the key from Answering side using Twilio TwiML?

References

Reference NO 1

http://stackoverflow.com/questions/13583338/how-to-gather-the-key-from-answering-side-using-twilio-twiml

Reference NO 2

http://stackoverflow.com/questions/17558793/press-1-at-any-time-in-twilio

Reference NO 3

http://stackoverflow.com/questions/13606070/how-to-gather-a-key-in-between-the-call-using-twilio

Reference NO 4

http://stackoverflow.com/questions/8981000/playing-music-in-a-call-with-twilio

Reference NO 5

http://www.twilio.com/docs/howto/callscreening

Reference NO 6

#EANF#

Reference NO 7

#EANF#

Reference NO 8

#EANF#