*astTECS IP PBX is built on an open source Asterisk platform which provides all of the features you would expect from a proprietary PBX at a much affordable price.
As*astTECS IP PBX is based on open standard, it can integrate seamlessly with any third-party applications - CRM, ERP, WhatsAPP, SMS, and many more. The key features are voice logger, IVR, Web based receptionist console, audio conference, video calling, distributed office set up, voicemail to email, smart phone with Wi-Fi client.