ÇATI MALZEMELERİ

[Construction – Section 59]

Other lower categories of building control, the talk investment house and the house phone, the loudspeaker system, the announcement system and the antenna location.

A talk-house system

This is an internal telephone from room to room, from apartment to apartment, or from the entrance door of a house to an apartment.
At the entrance door, a house plant usually talk to the access control.
 
Meanwhile devices are also available, a digital camera and a small screen to the other body. This allows the conversation partners also seen.
For the realization of a house plant can usually talk on wire cables that are cheaper than what a radio transmission.

TELEPHONE

In a telephone network (telephone) is a communications system for the processing of telephone conversations (telephony) is constructed. The international designation is Public Switched Telephone Network (communicated telephone network), abbreviated to the consumer-the little-known acronym PSTN. Often, even the term synonymous Plain Old Telephone Service (POTS) used, the analog telephone network.

Meanwhile, however, this term is outdated because of the predominant ISDN network in Europe, in addition to telephony and other services such as fax and data transmission will be settled and therefore no longer pure telephone network.
In order to emphasize this aspect, it is also often the expression General Switched Telephone Network (GSTN) and the less common Public Switched Telephone Network (PSTN). Under GSTN is then not only the public telephone network understood, but also all the other networks, the switching technology using networks also on the technical basis of ATM, ISDN, wireless networks and private telephone networks. 

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