Telephony Trainer Model ETR 040
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Telephony Trainer Model ETR 040
Sci-tech Telephony Trainer Model ETR 040 offers experiment board for creating, checking, measuring and troubleshooting telephone circuits such as: DTMF and Pulse signaling and a switching matrix simulating a telephone exchange and public network. It contains all the preassembled electronic components needed to construct the experiment circuits and divided into functional blocks which can be interconnected and modified by means of supplied jumpers and connection cables. Using PCM switching and transmission system Sci-tech Telephony Trainer Model ETR 040 enables to carry out a communication between two electronic telephone sets.
Size: | 40cm x 30cm x 15cm (LxWxH) |
Weight: | 12 kg |
Item Description
Sci-tech Telephony Trainer Model ETR 040 offers experiment board for creating, checking, measuring and troubleshooting telephone circuits such as: DTMF and Pulse signaling and a switching matrix simulating a telephone exchange and public network. It contains all the preassembled electronic components needed to construct the experiment circuits and divided into functional blocks which can be interconnected and modified by means of supplied jumpers and connection cables. Using PCM switching and transmission system Sci-tech Telephony Trainer Model ETR 040 enables to carry out a communication between two electronic telephone sets.
Technical Specifications
Training Syllabus
- Public Exchange working: – Signaling way out – Generation of signaling
- Signaling generated by the public exchange: – Power supply: Exchange battery, Chokes and feed resistors – Calling
- Telephone signaling systems: – Combinatory disk – Decade keyboard (PULSE) – Dual Tone Multi-frequency signaling (DTMF)
- Telephone operation with pulse and multi-frequency selection: – Calling circuits (Buzzer) – Selection circuits (Dialing) – Phone circuits (Speech)
- Reception and decoding of DTMF signals through active filters.
- Use of custom integrated circuits
- Establishment of a call and line circuit connections
- Connecting phones in derivation
- Troubleshooting
Specifications
Indicators - LED indication provided for LINE IN, HOOK, TONE and RINGER.
Dialer & Speech - Tone and Pulse Dialers are provided – Fully Non-Blocking Speech Path - ToneFrequencyisof430Hz.
Port Connector - One DOT line connection Port
– One Handset connection Port
Keyboard - 4x3MatrixKeyboard - Dialer Keypad contains 0-9, # & *
On board Features
- – Mute, Redial, Flash and On/Off Hook switches.
- – FacilitytoRedialupto32digits.
- – Dialer and Ringer section.
- – Ringer Volume control Provided using Potentiometer
- – Pulse dialing as well as Tone dialing facility provided thru switch.
- – Fully Non-Blocking Speed Patch
- – DialPulse-Ratiois10pps+/-10%
- – Four Switch Faults are provided. - Block Description Screen printed on glassy epoxy PCB.
- Power Supply - Input Power is obtained from Telephone lines.
- Test points are provided to analyze signals at various points.
- All ICS are mounted on IC Sockets.
- Bare board Tested Glass Epoxy SMOBC PCB is used.
- Power is taken from the external telephone line, no separate power supply required.
- User’s Manual is provided.
Model Number
ETR 040
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