My requirement is to establish voice calls from android phone to VOIP landline phone, its perfectly working using android sip protocol API. But its not working on all android version mobiles. Now i am trying to develop using JAIN-SIP third party API.I have done every thing as per API,but i can't able to solve my problem by using this api as shown below link.
Link :https://github.com/Mobicents/restcomm-android-sdk/tree/master/Examples/JAIN%20SIP
I am getting this exception: