I have asterisk pbx system and I am looking to update it by adding a phone application.
for example, if the phone is not answered in 3 rings it starts ringing in the phone app.
5 freelancers are bidding on average $138 for this job
I have 10 years of experience in asterisk, freepbx, Vitalpbx, Elastix, Incredible pbx, fusionpbx, freeswitch, A2billing, ASTPP and voip solutions. please check my profile for details