What is Integrated Services Digital Network (ISDN)? Integrated Services Digital Network (ISDN): The ISDN is an abbreviation of the Integrated Services Digital Network. The current communications networks vary with the type of services, such as telephone networks, telex networks, and digital data transmission networks. On the other hand, the ISDN is an integrated network for … [Read more...] about Integrated Services Digital Network | ISDN
Technical Articles
Digital Switching
What is the Digital Switching System? Digital Switching System: A Digital switching system, in general, is one in which signals are switched in digital form. These signals may represent speech or data. The digital signals of several speech samples are time-multiplexed on a common media before being switched through the system. To connect any two subscribers, it is … [Read more...] about Digital Switching
Basic Principles of Electronic Exchanges
Basic Principles of Electronic Exchanges: The prime purpose of an exchange is to provide a temporary path for simultaneous. bi-directional transmission of speech between (i) Subscriber lines connected to the same exchange (local switching) (ii) Subscriber lines and trunks to other exchange(outgoing trunk call) (iii) Subscriber lines and trunks from other … [Read more...] about Basic Principles of Electronic Exchanges
Basic Concept of Telephone Traffic
How to Define Telephone Traffic? Basic Concept of Telephone Traffic: 2.0 Introduction Telephone traffic is originated by the individual needs of different subscribers and so it is beyond the control of telephone administration. Any and every subscriber can originate a call at any and every moment without giving any previous information and the duration of calls is also … [Read more...] about Basic Concept of Telephone Traffic
Electronic Exchanges
What are the Electronic Exchanges? What are the advantages and types of Electronic Exchanges? Electronic Exchanges: To overcome the limitations of manual switching; automatic exchanges, having Electro-mechanical components, were developed. Strowger exchange, the first automatic exchange having a direct control feature, appeared in 1892 in La Porte (Indiana). Though it … [Read more...] about Electronic Exchanges