Open Source Call Centre Software

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Referensi

1. Issabel Project, https://www.issabel.org/
2. Independence Day for Elastix 4: Introducing Issabel 4, http://nerdvittles.com/?p=22598
3. A Better Way to Deploy Incredible PBX in the Google Cloud, http://nerdvittles.com/?p=28563
4. Vicidial, http://www.vicidial.org/vicidial.php