Jaringan telepon umum: Béda antarrépisi

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Darkwind (obrolan | kontribusi)
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clean up, replaced: {{main| → {{utama| using AWB
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=== Early history ===
The first telephones had no network but were in private use, wired together in pairs. Users who wanted to talk to different people had as many telephones as necessary for the purpose. A user who wished to speak, whistled into the transmitter until the other party heard. Soon, however, a bell was added for signalling, and then a switchhook, and telephones took advantage of the exchange principle already employed in telegraph networks. Each telephone was wired to a local [[telephone exchange]], and the exchanges were wired together with [[trunking|trunks]]. Networks were connected together in a hierarchical manner until they spanned cities, countries, continents and oceans. This was the beginning of the PSTN, though the term was unknown for many decades.
 
Automation introduced [[pulse dial]]ing between the phone and the exchange, and then among exchanges, followed by more sophisticated address signaling including [[multi-frequency]], culminating in the [[SS7]] network that connected most exchanges by the end of the 20th century.
 
== Digital Channel ==
{{mainutama|telephone exchange}}
 
Although the network was created using analog voice connections through manual [[switchboard]]s, automated [[telephone exchange]]s replaced most switchboards, and later digital switch technologies were used. Most switches now use digital circuits between exchanges, with analog [[two-wire circuit]]s still used to connect to most telephones.
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== Hirarki Switch Telepon Indonesia ==
 
 
[[Kategori:Telekomunikasi]]