The list of suppliers of the German electric and electronic industry
Hosting of telecommunication systems (hosted PBX, IP centrex, cloud telecommunication systems)
Mobile radio networks
Expandable, modular telephone systems
Telephone systems, expandable with mobile terminal equipment (e.g. WLAN or DECT telephones)
Christoph Wichmann
HRB 21674, Wuppertal
DE 261 242 791