TAILIEUCHUNG - Tín hiệu trong các mạng viễn thông P9

The telephone userpart (TUP) is the first SS7 user part defined by CCITT. An early version appeared in the 1980 CCITT Yellow Book. The 1985 Red Book and the 1989 Blue Book include a number of additions and modifications [ 11. The term “telephone” dates back to the beginnings of the TUP development, when all calls were “speech” calls. The calls in the present telecommunication networks can also be used for facsimile, and other data communications. | Signaling in Telecommunication Networks. John G. van Bosse Copyright 1998 John Wiley Sons Inc. ISBNs 0-471-57377-9 Hardback 0-471-22415-4 Electronic TELEPHONE USER PART The telephone user part TUP is the first SS7 user part defined by CCITT. An early version appeared in the 1980 CCITT Yellow Book. The 1985 Red Book and the 1989 Blue Book include a number of additions and modifications 1 . The term telephone dates back to the beginnings of the TUP development when all calls were speech calls. The calls in the present telecommunication networks can also be used for facsimile and other data communications. TUP is primarily a link-by-link signaling system. It can be used on analog FDM trunks and on 64 kb s digital trunks see Sections and . The CCITT specifications cover TUP applications in national networks and in the international network. TUP has been designed to be backward compatible with R2 and SS6 signaling Chapters 4 and 6 and includes all features of these systems. National versions of TUP coexist with R2 signaling Chapter 4 in the networks of several countries. Since R2 provides end-to-end signaling between the originating and terminating exchanges of a connection TUP includes a similar procedure. One important aspect of TUP is its support of digital connectivity the provision of transparent end-to-end 64 kb s digital connections . The demand for this service is growing steadily because of new digital customer equipment such as high-speed facsimile machines. Telecoms in several countries have installed subscriber lines that can transfer 64 kb s digital information. These lines are the precursors of the digital subscriber lines for the integrated digital services network ISDN which are discussed in Chapter 10. TUP was introduced in the international network in the mid-1980s. It is also used with some modifications in the national networks of several countries. Telecoms in other countries have chosen to bypass TUP signaling. For example 195 196 TELEPHONE

TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
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.