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This document discusses circuit-switched digital technology and related concepts: ISDN is a digital communication network that integrates telephone, fax, and data by digitalizing existing telephone networks connected via modem. A LAN is a local network that allows information exchange and communication between equipment in a limited region. Central office switches establish temporary connections between subscribers in a public switched telephone network. A modem modulates and demodulates analog signals to encode and decode digital data for transmission over various means including radio.
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ISDN is a set of standards for digital transmission over telephone wires that requires adapters at both ends. It provides two channels for carrying data and one for control and signaling. A BRI line consists of two 64 kbps B channels and one 16 kbps D channel. A PRI has 23 B channels and one 64 kbps D channel.
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- It provides faster transmission speeds of 64 kbps and allows simultaneous transmission of voice and data.
- ISDN uses terminal adapters, network termination equipment, and reference points to connect user terminals to the network.
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Group11
- 1. How Circuit-Switched Digital Web presentation GROUP C ISDN LAN (Local Area Network) Central Office Switches Modem How Circuit-Switched Digital – p.1/6
- 2. ISDN Digital communication network that integrates and treats telephone, fax, and data communication. ISDN provides a high-speed, high-quality line service by digitalizing existing Public Switched Telephone Networks connected with the modem. How Circuit-Switched Digital – p.2/6
- 3. LAN (Local Area Network) LAN is Local Area Network.It is a network of the connection of the computer and the printer, etc. It has three definitions.First,we can exchange informa- tion between various equipment in the limited region .Second,the user who introduces it becomes a subject, and it manages and it manages it. Third,the equip- ment made by a different vender can be connected with LAN, and it is possible to communicate mutually. How Circuit-Switched Digital – p.3/6
- 4. Central Office Switches Central office switch is the generic name for the net- work element in the PSTN that establishes tempo- rary connections between two subscribers.It is a voice switch that resides in the central office (CO) of an ILEC, CLEC, or IXC. How Circuit-Switched Digital – p.4/6
- 5. Modem Modem (from modulator-demodulator) is a device that modulates an analog carrier signal to encode digital in- formation, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and de- coded to reproduce the original digital data. Modems can be used over any means of transmitting analog sig- nals, from driven diodes to radio How Circuit-Switched Digital – p.5/6
- 6. References • e-Words URL:http://e-words.jp/w/ISDN.html • Wikipedia URL:http://ja.wikipedia.org/wiki/ • Hill2dot0 URL:http://www.hill2dot0.com/ How Circuit-Switched Digital – p.6/6