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Systems with independent lines (CODI designs)
The design which is a compromise between cabling network simplicity and reliability is based on a system with independent lines. The main idea of such a system is the way how telephones are connected to the speech network. Here (in contradiction to the parallel 1-pair system) it is not a telephone but exchange (or external unit) to decide which line will be connected to the speech network. In an idle state all the lines are disconnected having no influence on the total system. When certain apartment is called corresponding line is connected to the network keeping the others still disconnected. This way we achieve in the system full immunity to any short-circuit on any line.
In the beginning these systems contained one "discrete" cross-connection unit, located in the lower part of the building.
The design which is a compromise between cabling network simplicity and reliability is based on a system with independent lines. The main idea of such a system is the way how telephones are connected to the speech network. Here (in contradiction to the parallel 1-pair system) it is not a telephone but exchange (or external unit) to decide which line will be connected to the speech network. In an idle state all the lines are disconnected having no influence on the total system. When certain apartment is called corresponding line is connected to the network keeping the others still disconnected. This way we achieve in the system full immunity to any short-circuit on any line.
In the beginning these systems contained one "discrete" cross-connection unit, located in the lower part of the building.
Copyright @ Mariusz Tomczyk 2010 All Rights Reserved
Later on we have designed the system containing "distributed" cross-connection unit (already patented) which leads to not only much simpler cabling but what is the most interesting - enables full internal communication in all directions without any need to complicate existing cabling installation.
In the system like that we can:
| ■ | make intercom connections between two or more apartments; |
| ■ | send alarm signals to dedicated group of apartments, information signals or arrange a communication of any kind on user's wish; |
| ■ | totally control the system; |
| ■ | automatically test the condition of each line; |
| ■ | achieve excellent speech quality (always constant speech circuits load - no matter how many telephones are conected to the network). |
In the system like that we do not have to:
| ■ | be afraid about short circuits on individual line - only this one does not work; |
| ■ | separately programm each telephone - all of them are always the same; |
| ■ | shout loudly in order to communicate. |
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Warsaw, Poland
Renesansowa 7 c
Tel: +48 22 834-66-26
Fax: +48 22 835-32-01
Renesansowa 7 c
Tel: +48 22 834-66-26
Fax: +48 22 835-32-01
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