A voice over IP (VoIP) call path. One SIP trunk supports one phone call. See SIP trunking and VoIP.
"SIP trunk." YourDictionary, n.d. Web. 24 June 2018. <http://www.yourdictionary.com/sip-trunk>.
SIP trunk. (n.d.). Retrieved June 24th, 2018, from http://www.yourdictionary.com/sip-trunk
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