Telephone Hybrid
Public Switched Telephone Network, Four-wire Circuit, Echo cancellation
978-613-9-00304-4
6139003040
160
2012-01-14
49,00 €
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. Telephone hybrids are an essential functional component of the Public Switched Telephone Network (PSTN). The term also describes the piece of equipment used in broadcast facilities to enable the airing of telephone callers. The need for hybrids comes from the nature of analog plain old telephone service home or small business telephone lines, where the two audio directions are combined on a single two-wire pair. Within the telephone network, switching and transmission are almost always four-wire circuits with the two signals being separated.
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