The Module CTFaxBox is a carrier-grade fax service which provides receiving, forwarding, as well as sending of fax messages.  This gives the service provider a comprehensive fax server service for their customers.  Via CTFaxBox' web interface (VAS GUI) the tenants can establish fax accounts for their customers. The users of fax boxes can configure/forward/notify them by phone or web browser, if the VAS-GUI is enabled. While the standard functionality already meets the high expectations of currently available carrier-grade fax solutions, the service can be adjusted or extended on request.