understanding automatic telephone exchange / epabx · pdf filescientech 2657 understanding...
TRANSCRIPT
• Study of switching phenomena
Study of various detection phenomena
Study of traffic units
Complete Block diagram of EPABX system on-board
Easy identification of different sections and signal flow through LED visualizations
Easy measurement of voltages and observation of waveforms
Soldering free fault creation and troubleshooting
Online Product Tutorial
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Features
Scientech 2657 Understanding Automatic Telephone Exchange / EPABX System is an ideal training platform to
learn the operation of Automatic Telephone Exchange/ EPABX. It is demonstrator cum training system specifically
designed for the comprehensive practical study on Automatic Telephone Exchange / EPABX System for the
beginners with a basic knowledge of the various electronic building blocks and fundamentals of communication
system.
This didactic product develops the sense of investigation within the student and familiarises him with repair
techniques/design techniques. One of the main features of this training system is fault simulation to educate on
actual fault finding, by simulating faults on this platform. The complete block diagram of EPABX System is printed
on the mimic. Finally this equipment allows us to do experiments and to observe waveforms/signals/voltages of
different sections, which are guided thoroughly by theory and product tutorials to gain in-depth knowledge of the
system.
Scientech 2657
Understanding Automatic Telephone Exchange / EPABX System
Scientech 2657
Understanding Automatic Telephone Exchange / EPABX System
Scope of LearningTo study the:
? Power Supply unit of EPABX System
?Trunk unit and analyze: ring detection phenomena/ trunk relay switching
?Extension unit and switching mechanism of relay
?Analyze and measure the 'Off' hook detection
?Analyze the received tone and audio signals
?Control unit and analyze the ring enable control signals
?Decode unit & DTMF unit and analyze the DTMF signal
?Ringer unit and analyze the ringer voltage generation
?Analyze and measure that ring back tone, dial tone, busy tone, and music tone
?Switching matrix and CPU + memory unit
?System programming
Technical SpecificationsNumber of Inputs : 3 Trunk / Direct Lines
Number of Extension : 8 Lines
Technology : CMOS Cross Point Switching for Speech Communication (Microcontroller based)
Standard Features : Tones such as Dial, Busy, Ring, Music on Hold etc.
Dialing : DTMF and Pulse Dialing (Speed: 10pps; Ratio 66.33%; IDP 800ms)
Program Memory : 512 kb EEPROM
Protection : Opto- isolation for input and extension lines
Loop Resistance : Extension -600 Ohms, Co-line- 1200 Ohms
Cross Talk Attenuation : >70 dBm
Switched Faults : 8 nos
Test Points : 40 nos
Features that can be set : Line Hunting, Direct Access to trunk line, Redial, Line Status Indication, Automatic call back, Do
Not Disturb, Call Transfer, Call Pick Up, Call Forwarding, Call parking, Conference, Hot line System,
Extension Privacy, Call Transfer, Barge in, Non- blocking, Distinct Ringing, Abbreviated dialing,
Extension to Extension Call, Selective Access, Simultaneous Ringing, Alarm Call, etc.
Fuse : 1 A
Main Supply : 230V AC ± 10%, 50/60Hz (110V AC on request)
Weight : 3 kgs approximately
Dimension (mm) : W 440 × D 255 × H 150
0Operating Conditions : 0-40 C, 80% RH
Product Tutorial : Online (on www.ScientechLearning.com)
Included Accessories : Mains cord - 1 no.
Telephone instruments - 4 nos.
Scientech Technologies Pvt. Ltd.94, Electronic Complex, Pardesipura, Indore-452010, India. +91-731-4211100, [email protected], www.ScientechWorld.com, Helpline : +91 9893270301