Telewebtech has been supportive of open phone systems since its inception, in fact it was founded on the idea that systems should be built to embrace component competition. We have not opted for Open Source solutions (yet) and find that many of our clients do not easily differentiate between the two. Open platform phone systems are the result of phones that run on the existing IT network and standard protocols for voice communications over the internet, in particular Session Initiation Protocol (SIP). These phone systems are built by for-profit companies, like 3CX, that are invested in the success and development of the system. Read more if you would like to know why they are considered “open” and how they drastically cut the cost of systems while increasing the value to the company.