SIPquest, which makes SIP-based Internet telephony software applications, has attracted US$6 million in private equity from Covington Capital and Skypoint Capital. The Ottawa-based company, whose customers include 3Com Inc., said the money will be used get its technology into customers looking for multimedia collaboration and mobility capabilities, as well as providing service to enterprise equipment vendors and service providers. SIPQuest received $3.5 million in first round of financing from Covington, Skypoint and Santa Monica, Ca.-based Venturelab. The company had revenue last year of more than US$1 million.