What SIP services are available?
SIP services are emerging from lab trials and into commercial deployments. We list Service Providers that are currently active. If you know of, or are deploying, any other services then let us know. Who developed SIP? SIP is an IETF driven initiative and development. Activity has been centred at Columbia University. Who is using SIP today? The SIP Center follows Service Providers active in SIP. Take a look at what the market is doing in the Service Provider section. If you know of, or are deploying, any other services then let us know . Who is developing SIP products today? The Products and Services section provides a list of many of the companies. This list is not exhaustive as the number is increasing all the time. Let us know if you are developing a product.