ÇATI MALZEMELERİ

 [Construction – Section 60]

THE NETWORKS

A phone network is usually in the various sub-networks, each have different functions.

Connecting networks:

This network is financed principally by the placement agencies. Exercise is the communication channels between the participants to turn up and manage.

Access networks:

This network serves the efficient integration of the participants in the connecting network.

Signaling Networks:

As long as only analog placement offices were in the telephone network, had all the information necessary to call and removal were necessary, in the voice channels to be transmitted with (elected code, or some parts still providing Ringing create etc.). Since the introduction of digital switching centers were voice transmission and the transmission of signaling information separately. About the signaling network, the call control and removal.

That is, it will transmit the selected phone number and the placement agency for the selected participants found that all actions are part of this transfer (pick up the receiver, dial, hang up, primary, etc.), including the construction and dismantling of voice channels will be coordinated thereon.
All of the telephone network installations are on the signaling network linked. Central to this network are Signaling Transfer Points i.e. The STP, the signaling system No. 7 as a signaling protocol.

Data networks:

About data networks are services such as Internet, e-mail, etc. settled. A participant wishes a data connection, such as DSL, this is already in the local exchange offices identified and then an appropriate connection to dial into the Internet node running.

ANTENNA TECHNIQUES:

An antenna is used for sending or receiving electromagnetic waves. The size is in the order of magnitude of the wave length, with short wavelengths also a multiple for very long, and even a fraction of them, ranging from several hundred meters for the long-wave range below 10 kHz down to a few millimeters for the high frequency range above 50 GHz . A transmitting antenna converts electromagnetic, grid-waves in space waves, which are a receiving antenna back into electrical grid waves regress. New techniques are but satellite technology, which in almost all newly built homes receive.

Sayfa 1 | Sayfa 2 | Sayfa 3

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