20-09-2012, 01:50 PM
SDH Transmission Systems
[attachment=34164]
Introduction to the Subject
Beginning with the '70s, the Plesiochronous Digital Hierarchy (PDH) has been introduced and widely used in telephone networks, according to international standards defined by the International Telecommunications Union - Telecommunications sector (ITU-T). The PDH standard defines a hierarchy of digital signals, based on asynchronous digital multiplexing. In the European version, standard bit rates are 2.048 Mbit/s, 8.448 Mbit/s, 34.368 Mbit/s, 139.264 Mbit/s and 564.992 Mbit/s.
In late '80s, the ITU-T defined the new digital transmission standard named Synchronous Digital Hierarchy (SDH), based on the USA standard Synchronous Optical NETwork (SONET). Standard bit rates of SDH are 155.520 Mbit/s, 622.080 Mbit/s, 2.488320 Gbit/s, 9.953280 Gbit/s and above. SDH was designed using multiplexing and justification techniques that are rather complex, but flexible, to allow synchronous multiplexing of plesiochronous tributaries.
The SDH technique features numerous accessory functions and advantages, beginning with its very high transmission capacity. Today, SDH has replaced most PDH systems, except in some radio relay systems. High capacity SDH backbone networks are the transmission infrastructure not only of legacy telephone networks, but also of packet-switched broadband networks (ATM, IP). Newer developments of SDH, namely Virtual Concatenation (VCAT) and Link Capacity Adjustment Scheme (LCAS), further enhance its flexibility and capabilities, and make it the transmission technology of choice also for high-speed data transport networks.
Intended Audience
This course has been designed primarily for the technical personnel of telecommunications operators, service providers and equipment suppliers. This may include, but not exclusively, PDH/SDH system engineers, network planners, hardware and software designers, engineers in charge of system testing, operation, maintenance and customer support. It is well suited also for marketing and product managers, who need an overview on all aspects of this technology for promoting products effectively.
Not only practitioners or new-to-the job should attend this course, but also senior personnel with expertise in the field will discover several enlightening aspects and will benefit from attending it.
The richness and depth of course topics cover a wide spectrum of practical and theoretical issues. According to the audience background and previous expertise, the course may be tailored to beginners (entry level) or to experts (advanced level).
[attachment=34164]
Introduction to the Subject
Beginning with the '70s, the Plesiochronous Digital Hierarchy (PDH) has been introduced and widely used in telephone networks, according to international standards defined by the International Telecommunications Union - Telecommunications sector (ITU-T). The PDH standard defines a hierarchy of digital signals, based on asynchronous digital multiplexing. In the European version, standard bit rates are 2.048 Mbit/s, 8.448 Mbit/s, 34.368 Mbit/s, 139.264 Mbit/s and 564.992 Mbit/s.
In late '80s, the ITU-T defined the new digital transmission standard named Synchronous Digital Hierarchy (SDH), based on the USA standard Synchronous Optical NETwork (SONET). Standard bit rates of SDH are 155.520 Mbit/s, 622.080 Mbit/s, 2.488320 Gbit/s, 9.953280 Gbit/s and above. SDH was designed using multiplexing and justification techniques that are rather complex, but flexible, to allow synchronous multiplexing of plesiochronous tributaries.
The SDH technique features numerous accessory functions and advantages, beginning with its very high transmission capacity. Today, SDH has replaced most PDH systems, except in some radio relay systems. High capacity SDH backbone networks are the transmission infrastructure not only of legacy telephone networks, but also of packet-switched broadband networks (ATM, IP). Newer developments of SDH, namely Virtual Concatenation (VCAT) and Link Capacity Adjustment Scheme (LCAS), further enhance its flexibility and capabilities, and make it the transmission technology of choice also for high-speed data transport networks.
Intended Audience
This course has been designed primarily for the technical personnel of telecommunications operators, service providers and equipment suppliers. This may include, but not exclusively, PDH/SDH system engineers, network planners, hardware and software designers, engineers in charge of system testing, operation, maintenance and customer support. It is well suited also for marketing and product managers, who need an overview on all aspects of this technology for promoting products effectively.
Not only practitioners or new-to-the job should attend this course, but also senior personnel with expertise in the field will discover several enlightening aspects and will benefit from attending it.
The richness and depth of course topics cover a wide spectrum of practical and theoretical issues. According to the audience background and previous expertise, the course may be tailored to beginners (entry level) or to experts (advanced level).