This thesis describes types and parameters of memories used in communication engineering. The memory is a device which is able to record and to save information for the certain period of time. The memory is used in computers, measuring devices, consumer electronics etc. Main parameters of the memory are capacity, data stream speed, price of bit and time of memory cycle. The first part of this thesis deals with two types of memory – external and internal. External memories are removable media such as discs and magnetic tapes used for information saving and data backup for longtime period. Inner memories – in the form of semiconductive components – are mostly attached to the main panel. There are two types of inner memories – RAM (random access memory) and ROM (read only memory). The memories could be further divided according to their dependence on feeding used for memory saving. Types of memories used in switching exchanges are also mentioned in this part. The next part discusses the scheme of T switch for the first level of European PDH E1. The space switch and the time switch T belongs to switches used in digital switching exchange. In this part, the T switch, in particular the switch TR with controlled reading and the switch TW with controlled writing are described into details such as its parameters and methods of control. Furthermore, the calculation of call memory and control memory extant in E1 and E2 hierarchy are presented as well as the memory reading time and writing time of T switch in E1 and E2 hierarchy. The result of this thesis is a design of digital switching field animation that consists of four T switches. All operations, which are used in building linking of digital switching field, are shown in this animation.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:217315 |
| Date | January 2008 |
| Creators | Kučerka, Daniel |
| Contributors | Šilhavý, Pavel, Kapoun, Vladimír |
| Publisher | Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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