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
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