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.
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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