O'Reilly logo

Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization by Salman Asadullah, Ramesh Kaza

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Foreword

In October, 1998, Cisco took a step forward in its entry into IP Telephony with the acquisition of Selsius Systems, a pioneer and innovator of next generation network PBX systems for high-quality telephony over IP networks. This began the revolution of converged data, voice and video networks rendering separate voice and data networks a thing of the past. Cisco is one of the front runners in changing the way enterprises and service providers deliver converging traditional voice, data, and video applications.

The overall IP communication industry has gained significant momentum. The original Selsius Systems product family acquired by Cisco has expanded and evolved at tremendous speed. Over four million IP phones and over three million Unity ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required