PHP Liiketoiminta Oyj is a provider of products and services such as telephone conferencing services,video conferencing/teleconferencing services,internet telephony service providers (voip),voice transmission via power lines (voice over power line),integrated services digital network (isdn) services,trunked radio service providers,network providers for mobile telephones (cellular phones),universal mobile telecommunications system (umts) services,international telephone calling services,telecommunication operators,telephone network operators, wireless local loop,telephone network operators, analog,telephone network operators, digital,holding companies, telecommunications,telecommunication systems, satellite, mobile,telephone answering machines,integrated services digital network (isdn) switches,telecommunications equipment, time division duplex (tdd),emergency call systems for motorways,call centre management systems,image transmission and compression-expansion equipment,voice over dsl (vodsl) equipment,voice data systems, private networks,integrated voice mail systems, private networks,key system/key telephone systems,telephones, feature and novelty,telephone intercommunication equipment, conference,music on hold and digital announcer systems for telephone systems,telecommunications network equipment, fibre to the curb systems (fttc),telecommunications network equipment, fibre to the home systems (ftth),telecommunications network equipment, fibre in the loop systems (fitl),telecommunications network equipment, hybrid fibre-coaxial (hfc),photonic networking systems,local multipoint distribution service (lmds) network equipment.