@SaiKrishnaV4021  As of 8.7, SMS integration for Digital Messaging is predominantly designed around managing messaging interactions that start as inbound.  Part of the reason for this is there are some complex compliance challenges (opt-in and opt-out, time of day that messages are sent, etc) that need to be managed by the client for SMS.  However, it is possible to make an API call from Pega to Twilio to initiate an outbound message and then have the Digital Messaging channel pickup any inbound responses.  This may be a relatively straightforward option using Pega Connectors if you just want to send simple outbound messages and then have the responses looped into the IVA or Agent in CS.