SIP Trunking has drawn a lot of attention as an exciting new service offering that can reduce operating expenses for telephone services across a wide range of businesses. SIP Trunking promises to eliminate the cost of the expensive dedicated TDM trunking circuits that connect businesses to the public telephone network and dramatically reduce the cost of local and long distance charges. For a business to leverage SIP Trunking and the associated cost savings, the business must be able to terminate a SIP trunk into their existing telecommunications infrastructure. This paper discusses 10 important issues that any business should know before making a decision about bringing SIP Trunking into their current infrastructure.