PORTUS D.O.O. is a provider of products and services such as telex services,recording services for telephone messages and music,telephone conferencing services,audiotex services,facsimile (fax) services,voice mail services,multimedia message services (mms)/multimedia instant messaging services,voice transmission via power lines (voice over power line),radio communication services,telecommunications services, microwave,integrated services digital network (isdn) services,trunked radio service providers,payphone card network operators,telephone services, satellite,short message services (sms)/text messaging services,universal mobile telecommunications system (umts) services,international telephone calling services,paging services,telephone directory enquiry services,telephone network operators, wireless local loop,telephone network operators, analog,telephone network operators, digital,telephone network operators, fibre optics,telephone plugs and sockets (jack type),concentrators, telephone line,telecommunications - services.