Delivery Systems
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Figure 5 - Classification of Delivery Systems.
The Delivery System is divided into Networked Delivery Systems and Non-networked Delivery Systems. A non-networked Delivery System can be a local storage physical media like disc, tape or CD-ROM and is not specified in DAVIC 1.0. Non-networked Delivery Systems is left for future versions of the DAVIC specifications.
Networked Delivery Systems can be split into hertzian networks, cabled networks and hybrid cabled and hertzian networks.
Hertzian networks use the ether to transport signals and are therefore broadcast type networks like direct broadcast satellite and terrestrial broadcasting systems.
Cabled networks use physical cables to transport signals and are therefore of a more point-to-point or point-to-multipoint type networks. A cabled network can be a telecommunications network or a cable operator network.
The hybrid networks consist of a hertzian part and a cabled part. Examples of such networks are Multi-channel Multipoint Distribution System (MMDS) and Local Multipoint Distribution System (LMDS), but these networks are not considered in DAVIC 1.0 and are left for future versions of the DAVIC specifications. [1]
As this thesis focus on HFC networks, only cabled networks will be described in more detail in “Cabled Networks“.