TAILIEUCHUNG - Satellite networking principles and protocols phần 6

Bộ giải mã là phức tạp hơn, nơi mà các thông tin bên ngoài được sử dụng đệ quy. Đại diện thuận tiện nhất cho khái niệm này là để giới thiệu dự toán mềm của x = d 1 d 2 d 3 d 4 trong 1 bộ giải mã, được thể hiện như là tỷ lệ khả năng đăng nhập: L1 di = đăng nhập L2 di = đăng nhập 4 | 156 Satellite Networking Principles and Protocols signalling is attractive but one drawback is that when channel patching is required signalling leads have to be patched as well. Associated and disassociated channel signalling Traditionally signalling goes along with the traffic on the same channel it is associated with on the same media. This signalling may or may not go on the same media or path. Most often this type of signalling is transported on a separate channel in order to control a group of channels. A typical example is the European PCM E1 where one separate digital channel supports all supervisory signalling for 30 traffic channels. It is still associated channel signalling if it travels on the same media and path as its associated traffic channels. If the separated signalling channel follows a different path using perhaps different media it is called disassociated signalling. See Figure . ITU-T Signalling System No. 7 ITU-T SS7 always uses separated channels but can be associated and disassociated. Disassociated channel signalling is also called non-associated channel signalling. ITU-T signalling system No. 7 ITU-T SS7 ITU-T SS7 was developed to meet the advanced signalling requirements of the all-digital network based on the 64 kbit s channels. It operates in a quite different manner than a Conventional associated channel signalling. b Separate channel signalling with common channel signalling CCS . Figure Associated and separate signalling Satellite Internetworking with Terrestrial Networks 157 conventional signalling systems. Nevertheless it must provide supervision of circuits address signalling call progressing and alert notification. It is a data network entirely dedicated to interswitching signalling and can be summarised as the following it is optimised for operation with digital networks where switches use stored-program control SPC it meets the requirements of information transfer for inter-processor transactions with .

TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.