Telephone Network
Telecommunications Network, Telephone Exchange, Telephone operator
978-613-9-00322-8
6139003229
72
2012-01-14
29.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A telephone network is a telecommunications network used for telephone calls between two or more parties.Public telephone operators (PTOs) own and build networks of the first two types and provide services to the public under license from the national government. Virtual Network Operators (VNOs) lease capacity wholesale from the PTOs and sell on telephony service to the public directly. A telecommunications network is a collection of terminals, links and nodes which connect together to enable telecommunication between users of the terminals. Networks may use circuit switching or message switching.
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