SIP Trunking is the most affordable and flexible way to connect an IP PBX to the Public Switched Telephone Network (PSTN). SIP trunks can also provide dial-tone service to a traditional PBX or other legacy phone system via an Integrated Access Device (IAD). SIP is soaring in popularity because it saves money and offers additional features and functionalities over and above those of legacy ISDN PRI and BRI analog lines. This white paper will detail these advantages, as well as provide an overview of SIP trunking technology, guidelines for choosing a qualified SIP trunking provider, and advice for a successful installation.
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