CODITEL is a digital circuit commutation unit for didactic purposes. Its structure is like a temporal commutator structure with two MIC ways, one inlet way and one outlet way. Basically, it follows the recommendation of the CCITT and of Telephony.
This unit consist of the following parts: interfaces (connection with the outer world), internals, digital connection network and control system:
Interfaces: It consists of four user line circuits, two lines for tone terminals (multifrequency) and two lines for pulse terminals (decadic), made in different ways:
- The multifrequency circuits are hybrid integrated circuits carrying out all the basic functions of a line circuit.:
- The decadic circuits, where all their structure is mounted discrete components.
- The four line circuits are compatible with commercial user apparatus.
Internals: The unit has four number receiver, two of them are pulse receivers (decadic) and the other are tone receivers (DTMF), assigned to a specific line. It has a time base that supplies the appropriate temporization for the whole system and a digital tone generator.
Digital connection network: The connection network is a temporal commutation matrix, made with memories. Its architecture is like the one with a sequential writing and asynchronous reading commutator.
Control system: The control is carried out by a program stored in the computer (PC), and it is executed under the windows operating system 2000 or higher.
The communication between the computer (PC) the interface through serial RS232 protocol.
This Computer Controlled Unit is supplied with the EDIBON Computer Control System (SCADA), and includes: The unit itself + aControl Interface Box + a Data Acquisition Board + Computer Control, Data Acquisition and Data Management Software Packages, forcontrolling the process and all parameters involved in the process.
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