tailieunhanh - BUILDING BROADBAND NETWORKS phần 2

cho phép các dịch vụ đa phương tiện qua mạng LAN (Local Area Networks) dựa trên các công nghệ như ISDN không cung cấp QoS (Quality of Service) bảo đảm. Thiết bị đầu cuối tuân thủ ITU-T có thể hỗ trợ bất kỳ sự kết hợp của dữ liệu, video, và lưu lượng thoại khác nhau, từ một giọng nói chỉ người-người duy nhất gọi cầu truyền hình đa phương tiện đa tương tác. | Video Server FIGURE The addition of a video server and array to an in-place ISDN network to support additional applications. 2002 by CRC Press LLC for enabling multimedia services via LANs Local Area Networks based on technologies such as ISDN that do not provision QoS Quality of Service guarantees. ITU-T terminals can support any combination of data video and voice traffic ranging from a single person-to-person voice-only call to multiparty multimedia interactive videoconferences. Moreover the ITU-T Recommendation describes packet telephony architecture and protocols that facilitate call signaling call management and call control. Compression and decompression algorithms and functions supported by the ITU-T H. 323 Recommendation are also clarified in the ITU-T and ITU-T Recommendations. ITU-T services support RTP RTCP Real-Time Protocol Real-Time Control Protocol for video and audio signal management synchronization of video and audio streams and transmission of real-time content. services work in concert with RSVP Resource Reservation Protocol for provisioning dedicated bandwidth to specified applications. The ITU-T Recommendation establishes a foundation for multicast services and bandwidth management to enable seamless traffic flows. In addition the ITU-T Recommendation establishes a framework for enabling point-to-point point-to-multipoint and multipoint-to-multipoint videoconferences that function independently of in-place network operating systems and hardware configurations. ITU-T solutions support tele-education room-based and desktop videoconferencing workgroup computing electronic whiteboarding applications IP telephony or voice-over-IP VoIP and interactive teleshopping services. I. ITU-T Recommendation The ITU-T Recommendation provisions a scalable and extendible framework for multipoint data communications services that operate in interactive .