Currently, the SIP Forum has 45 "Full Member" companies and more than 5,000 individual members around the world. Recent dues-paying companies joining SIP Forum include Audiocodes, CableLabs, Covergence, Dialogic, HP, Microsoft, NEC Unified Solutions, Sonus Networks, and Tekelec.

SIP Forum Managing Director and President of the U.S.-based subsidiary of SIP Forum Marc Robins attributes the surge in growth to the work of the organization, and most especially the support and moment behind the SIPconnect SIP trunking initiative. SIPconnect has established an industry-approved set of rules and guidelines for setting up trouble-free (or at least less painful) direct IP peering between SIP-enabled IP PBXes and SIP-enabled VoIP providers. A SIPconnect approved product should be easily setup up with a SIP-enabled VoIP provider, making life much easier for the poor customer who has to set everything up in the first place.

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