SIP Trunk deployment is expected to grow from 8.5 million SIP trunks in 2009 to 24.3 million trunks in 2013, and many of those trunks will be deployed in small-medium businesses. SIP trunking is a technology that allows businesses to cheaply and easily implement voice over IP (VoIP) across the organization. According to the Heavy Reader Insider,  31 percent of businesses are currently using some type of VoIP technology, but experts expect that number will increase to 74 percent by 2013.

Experts attribute the growing popularity of SIP trunking to the significant cost savings and ease of deployment the technology inherently provides.  SIP trunking saves money by eliminating the need to invest in Base Rate Interfaces (BRIs), Primary Rate Interfaces (PRIs), PSTN gateways, and additional line cards.