VoIP applications and the Cloud – Where gen_fsm really shines

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Aptela provides hosted communications services for small business. Our –
entirely cloud based – platform includes complex call routing,
messaging, web-portals, mobile apps, PSTN/SIP access, and a
coffee-grinder attachment. At peak, we handle dozens of calls (and an
infinity of HTTP requests) per second.

These complex calling services
work thanks to the magic of gen_fsm, a behaviour which is frequently
overlooked at best, and ignored at worst. In the first part of the
talk, I’ll describe our architecture, with gen_fsm’s critical role in it
as the focus. The second part will delve into the specifics of how this behaviour can help build out complex calling services, with examples
culled from some of Aptela’s cooler (or crazier?) features


  • Mahesh Paolini-Subramanya

    Creator the world's first online commerce system

    Mahesh is the CTO of Vocalocity, a position he has held since its merger with Aptela.  Drawing upon 20 years of accomplishments in Internet based services, He is a recognized thought leader in the VoIP industry. An Internet pioneer, he developed the technological foundation for the e-commerce revolution by helping to create the world's first online commerce system, and has since been at the forefront of the development of hosted VoIP services.

    Mahesh was previously a founder and CTO of Aptela prior to its merger with Vocalocity.  Before that, he was V.P. of Development at Neoglyphics Media where he inaugurated the use of Java technologies in financial services and CTO of Proxicom where he also led the Technology practice.  He holds a B. Tech. from the Indian Institute of Technology - Kanpur and an M.S. in Electrical Engineering from the University of Notre Dame.

    Mahesh Paolini-Subramanya
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Posted on October 31, 2011