SIP stands from Session Initiation Protocol. SIP Trunks, on the other hand, refers to components that connect the user’s phone system so they can route their calls over an IP network instead of using traditional fixed ISDN lines.
SIP calling offers businesses a wide range of benefits including enormous cost-savings as the system runs over an IP network rather than fixed lines. SIP trunks eliminate rental cost and remove the expensive installation and maintenance fees of traditional ISDN lines. In addition, they allow employees to integrate their phones with web, mail and online chat for a more streamlined experience to enhance productivity and improve customer satisfaction.