Telephony Systems Unit

The unit is based on a digital or temporal commutator enabling the study of emission in any order on the channels of an outlet multiplex. The samples that are shown in a certain order, on channels of an inlet multiplex.

ATENG 10967 — Telephony Systems Unit

(for main items)

• With this unit there are several options and possibilities:
• Main items: 1, 2, 3, and 4.
• Optional items: 5, 6 y 7.
• Let us describe first the main items (1 to 4):
• 1CODITEL. Unit:
  System is mounted on a desktop box.
  Diagram in the front panel of the unit with the same structure as the real hardware.
  Provides access to all main signals.
  Follows all the recommendations of CCITT (Cosultive Comitte International Telephony and Telegraphy).
  Structure is based on the standard for digital commutation systems.
  Time division multiplexing(TDM) and Pulse code Modulation (PCM) principles.
  Communication based on a temporal commutator that supports up to fifteen
  complete internal communications with two MIC ways, one inlet way and one
  outlet way.
  Standard MIC system of 32 channels with dynamic assignament and frame
  synchronization. 30 channels used for voice transmission and 2 used for
  signalling and synchronism. Signal conversion using standard codec, 8 KHz
  of sample rate, 8 bits per sample and 64Kb/s per channel and 2,048 Mb/s
  system frame.
• Internal hardware consists of two electronics boards: an analog board with all
  integrated and discrete analog elements and a digital board based on FPGA
• Unit: ATENG 10967
  technology.
• Structure integrated with all the internal common elements in a telephone system: subscriber´s line, tone
  generator, base of times, filtering stage, switching matrix, number decoders and control memory.
  Two subscribers lines implemented with discrete elements (hybrid coils, ring circuit, supply circuit). Two subscribers lines implemented with integrated elements Subscriber`s Line Interface Circuits (SLIC).
  Functions as battery feed, overvoltage protection, ringing, coding and decoding, supervision, signalling,
  2-4 wires conversion and test( BORSCHT functions) covered, in each line.
  High precision digital tone synthetizer 400 Hz (dial invitation tone, call recapturing tone and busy tone)
  using Direct Digital Synthetizer (DDS).
  Four commercial receptors (telephones), two used for signaling by pulses and other two for tones or Dual
  Tone Multi Frequency Signalling (DTMF).
  Switching memory matrix, control memory and base of times implemented with FPGA technology with
  high stability and fiability.
  Standard RS232 protocol for communication between the PC and the unit.
• The complete unit includes as well:
  Advanced Real-Time SCADA.
  Specialized Control Software based on LabVIEW.
  Projector and/or electronic whiteboard compatibility allows the unit to be explained and
  demonstrated to an entire class at one time.
  Capable of doing applied research, real industrial simulation, training courses, etc.
  Remote operation and control by the user and remote control for technical support,
  are always included.
  Totally safe, utilizing 4 safety systems (Mechanical, Electrical, Electronic & Software).
  Designed and manufactured under several quality standards.
  Optional ICAI software to create, edit and carry out practical exercises, tests, exams,
  calculations, etc. Apart from monitoring user's knowledge and progress reached.
  This unit has been designed for future expansion and integration. A common expansion is
  the Scada-Net (ESN) System which enables multiple students to simultaneously
  operate many units in a network.
  3

Complete Technical Specifications (for main items)

• CODITEL/CCSOF. Computer Control + Data Acquisition + Data Management Software:
  The three softwares are part of the SCADA system.
  Compatible with actual Windows operating systems. Graphic and intuitive simulation of the
  process in screen. Compatible with the industry standards.
  Registration and visualization of all process variables in an automatic and simultaneous way.
  Flexible, open and multicontrol software, developed with actual windows graphic systems,
  acting simultaneously on all process parameters.
  Management, processing, comparison and storage of data.
  Calibration system for the sensors involved in the process.
  It allows the registration of the alarms state and the graphic representation in real time.
  Comparative analysis of the obtained data, after the process and modification of the conditions
  during the process.
  Open software, allowing the teacher to modify texts, instructions. Teacher’s and

CODITEL/CCSOF

student’s passwords to facilitate the teacher’s control on the student, and allowing the access to

different work levels.

This unit allows the 30 students of the classroom to visualize simultaneously all the results

and the manipulation of the unit, during the process, by using a projector or an electronic

whiteboard.

3 Cables and Accessories, for normal operation.

• 4Manuals:
• This unit is supplied with 7 manuals: Required Services, Assembly and Installation, Control Software,
  Starting-up, Safety, Maintenance & Practices Manuals.
• References 1 to 6 are the main items: ATENG 10967 + CODITEL/CIB + DAB + CODITEL/CCSOF + Cables and Accessories + Manuals are
  included in the minimum supply for enabling normal and full operation.
  4