COMSIS is a provider of products and services such as video conferencing/teleconferencing systems (hire/rental),training courses, information technology (it) system management,telecommunication systems, satellite, mobile,telephone call counters,telephone call logging equipment,telecommunications equipment, time division duplex (tdd),call centre management systems,telex equipment,voice over dsl (vodsl) equipment,integrated voice mail systems, private networks,key system/key telephone systems,wireless communication headsets,music on hold and digital announcer systems for telephone systems,ear sets and microphones, hands-free, for mobile telephones (cellular phones),local multipoint distribution service (lmds) network equipment,videophones,minicomputers and mainframes - maintenance.