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2. SIP trunking - Wikipedia

   en.wikipedia.org/wiki/SIP_trunking

   SIP trunking is a voice over Internet Protocol (VoIP) technology and streaming media service based on the Session Initiation Protocol (SIP) by which Internet telephony service providers (ITSPs) deliver telephone services and unified communications to customers equipped with SIP-based private branch exchange (IP-PBX) and unified communications facilities. [1]

3. Small Business Phone System: A Guide to Service Types, Terms ...

   www.aol.com/small-business-phone-system-guide...

   Most VoIP phone systems use session initiation protocol (SIP) trunking. This standard supports multimedia communications, including text messaging and video calls.

4. SIP provider - Wikipedia

   en.wikipedia.org/wiki/SIP_provider

   A SIP provider (Session Initiation Protocol) is any telecommunications company which provides SIP trunking to customers, usually businesses. Many companies provide SIP "termination" (outbound calling) and "origination" (inbound calling, usually with a plain old telephone service (POTS) phone number, called a direct inward dialing (DID).

5. Session Initiation Protocol - Wikipedia

   en.wikipedia.org/wiki/Session_Initiation_Protocol

   SIP connection is a marketing term for voice over Internet Protocol (VoIP) services offered by many Internet telephony service providers (ITSPs). The service provides routing of telephone calls from a client's private branch exchange (PBX) telephone system to the PSTN.

6. Internet telephony service provider - Wikipedia

   en.wikipedia.org/wiki/Internet_telephony_service...

   Retail customers of an ITSP may use traditional analog telephone sets attached to an analog telephony adapter (ATA) to connect to the service provider's network via a local area network, they may use an IP phone, or they may connect a private branch exchange (PBX) system to the service via media gateways.

7. Broadvox Communications - Wikipedia

   en.wikipedia.org/wiki/Broadvox_Communications

   Broadvox was founded in 2001 as a wholesale VoIP carrier and is headquartered in Cleveland, Ohio with additional offices in Atlanta, Georgia and Dallas, Texas. [2] In 2003, Broadvox began offering SIP origination and termination, which increased the companies quality of the voice transmission and expanded service offerings.