At one point in the evolution of telecommunications features, least cost routing was so sophisticated a function that it required an external processor. In the early 80’s when most large multi site telephone system installations were based on point to point, private T1 tie-lines the need for cost effective routing between sites was in such demand that a stand alone company of scale was formed to meet that need. In San Antonio Texas, a company still in existence today but [...]

SIP trunks can be used for a wide variety of call processing  solutions, some of which are very cost effective as in Free!   We have used  SIP tunks to interconnect ShoreTel systems over the Internet, complete with four digit dialing between systems!    Most recently,  we have been able to create a ShoreTel compatible audio conference server at a fraction of the cost normally associated with these servers.   The most costly part of  this conference solution  was the [...]