AsteriskConnect uses either ARI (Asterisk Rest Manager) or AMI ( Asterisk Manager Interface) to make calls through the corporate PBX (Asterisk, FreePBX, TriBox or Elastix). It allows you to make calls in a more cost-effective manner (average 40-80% cost savings), using your Asterisk PBX to do do Callback or Call-Trought (DISA) calls.