Voice Trunking in an IP World: Charting a Practical Path for PRI and SIP


IT leaders understand the real-world road to all-IP means leveraging existing technology investments as well as intelligently integrating leading-edge IP capabilities. Utilizing Session Initiation Protocol (SIP) trunking for IP PBX telephone systems is a practical step in the evolution of business networks that currently rely on Primary Rate Interface (PRI) connections. SIP Trunking offers the potential for cost-savings on telephone service charges and legacy equipment upgrades, flexibility in scaling call capacity, enhanced business continuity capabilities, unified communications, as well as a future-proof network evolution path. This paper details SIP Trunking and PRI options and shares advice for selecting a service provider.

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