Callserve is a global voice over IP (VoIP) service provider operating under the Callserve and Phoneserve brands. Phoneserve is a Internet calling cards business with a network of 2,500 partners and resellers worldwide. Callserve is a popular Internet PC-to-phone brands in the world. Callserve has been offering its customers high quality of service and huge reductions to their bills se 1999 and is one of the developers of the VoIP market. Callserve is based in London and offers its own-branded Internet telecommunications service to leadibng IT companies luding ISPs, Internet cafes, PC manufacturers, web portals and Internet and eBusiness software providers.