초록 ▼

A service-integrated communication transmission and exchange or relay system for audio, video and data services, of the type including a central exchange or relay office and a plurality of user equipment connected thereto by means of optical fibre cables, and wherein the user equipment are equipped

A service-integrated communication transmission and exchange or relay system for audio, video and data services, of the type including a central exchange or relay office and a plurality of user equipment connected thereto by means of optical fibre cables, and wherein the user equipment are equipped with selection and receiving devices for selecting and receiving certain services and their programs which are transmitted over possibly likewise selectable transmission channels. An acknowledgment arrangement is provided with which the selection and relaying of the services by the central office can be acknowledged to the user equipment.

대표청구항 ▼

In a service-integrated communication transmission and exchange system for audio, video and data services, said system including a central exchange station for supplying selected services and a plurality of user equipments connected to said central exchange station by means of optical fiber cables a

In a service-integrated communication transmission and exchange system for audio, video and data services, said system including a central exchange station for supplying selected services and a plurality of user equipments connected to said central exchange station by means of optical fiber cables and associated optical transmitters and receivers, said user equipments being equipped with means for transmitting a selection signal to said exchange station to select certain desired services and their programs to be transmitted by said exchange station over likewise selectable transmission channels and for receiving the transmitted programs, the improvement wherein said exchange station further includes an acknowledgment means for producing a signal acknowledging receipt of a selection signal from a user equipment and means for transmitting the acknowledging signal to the associated user equipment; wherein said means for producing said acknowledgment signal comprises means for keying in or out a carrier frequency, which is outside of the signal frequency range of the selectable services, according to a code representing the acknowledgment signal being transmitted; wherein said means for transmitting said acknowledgment signal to said user equipment includes means for combining same with the signals of the selected program being transmitted by said exchange station; and wherein said user equipment includes means for receiving the transmitted acknowledgment signal including means for detecting the acknowledgment signal and displaying same on a display device.