Published: 29 September 2009
Analyst(s): Mark Cortner
The availability of Session Initiation Protocol (SIP)-based access services to the public switched telephone network (PSTN) enables enterprises to leverage investments in Voice over Internet Protocol (VoIP) technology and eliminate time-division multiplexing (TDM)-based trunks and gateways. But not all SIP trunking services are created equal; they range from the simple substitution of Integrated Services Digital Network (ISDN)-based to IP-based access services to intelligent network routing services. In this updated report, Senior Analyst Mark Cortner includes new perspective on the state of the SIP trunking market and analysis of its role in an enterprise's future telephony and unified communications (UC) plans.
Summary of Findings
©2020 Gartner, Inc. and/or its affiliates.
All rights reserved.
Gartner is a registered trademark of Gartner, Inc. and its affiliates.
This publication may not be reproduced or distributed in any form without Gartner’s prior written permission.
It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact.
While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information.
Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such.
Your access and use of this publication are governed by Gartner’s Usage Policy.
Gartner prides itself on its reputation for independence and objectivity.
Its research is produced independently by its research organization without input or influence from any third party.
For further information, see
Guiding Principles on Independence and Objectivity.