Paper Title
A Review On Design And Implementation Of IVR System Using Asterisk

The important part of many organizations is to provide interactive and cooperative customer care using telephony with client interaction. The interactive voice response (IVR) system serves as a communication link between computer and people with connection of the telephone network with acceptable instructions. The telephone user can get access to the information wherever wanted at any random time with the convenience of dialing a specific number and following an automated instruction when a connection established. The Interactive voice response system makes use of computer generated voice responses or pre-recorded message to provide information for responding to the choice given by a telephone caller. This choice may be the input given by Dual Tone Multi-Frequency (DTMF) signal, which gets generated from the telephone set as user or caller presses a choice numbered key, and the sequence of messages to be played according to an internal menu structure and the user input. In the proposed model, first the VoIP system has been implemented with IVR on asterisk server which works as a VoIP service provider. The asterisk server is configured on Centos (Linux) cloud server. The noticeable significance of the proposed system is VoIP server itself configured as a VoIP server, IVR provider, VPN server, in a single asterisk server internally with virtualization environment. There is one central server and many telephony endpoints registering with central server. The server's task is to resolve a dialed address to an IP address and make a connection for IVR. Index Terms— IVR, Voice over Internet Protocol (VOIP), Dual Tone Multi-Frequency (DTMF), Asterisk Server, SIP.