Working and realistic example

1. EPABX SYSTEMS
BY
M.PAVAN SAI
17981A04D1

2. ABSTRACT
A private branch exchange (PBX) is a telephone exchange that serves a particular
business or office, as opposed to one that a common carrier or telephone company
operates for many businesses or for the general public.
PBXs are also referred to as:
EPABX – electronic private automatic branch exchange
PBXs make connections among the internal telephones of a private organization—
usually a business—and also connect them to the public switched telephone
network (PSTN) via trunk lines. Because they incorporate telephones, fax
machines, modems, and more, the general term "extension" is used to refer to any
end point on the branch. PBXs are differentiated from "key systems" in that users
of key systems manually select their own outgoing lines, while PBXs select the
outgoing line automatically. Hybrid systems combine features of both.

3. INTRODUCTION :
Electronic Private Automatic Branch Exchange is a shortening that represents
EPABX System. It goes under the classification of business telephone frameworks
which serve a business environment. Multi-line connections can be made through
a solitary telephonic association. It is an office , Restaurant hardware of huge use
for telephonic availability with expansions of a solitary telephone line. It tends to
be leased from office And Restaurant gear providers as well.

4. FUNCTION OF THE EPABX SYSTEM

5. FUNCTION OF THE EPABX SYSTEM :
Four main functions of epabx system are:
 Establishing connections (circuits) between the telephone sets of two users (e.g. mapping a dialed
number to a physical phone, ensuring the phone isn't already busy)
 Maintaining such connections as long as the users require them.
 Disconnecting those connections as per the user's requirement
 Providing information for accounting purposes

6. INSTALLATION

7. INSTALLATION FOR PBX
 Inspect the Premises:
 Wiring for Extension Lines
 Programming the PBX Machine

8. VIDEO OF PBX SYSTEM

9. RECORDING FROM DIRECT PSTM LINES COVERS ALL
EXTENSIONS

10. COMPONENTS OF EPABX :
 External Telco trunks that deliver signals to and from the EPABX.
 Microcontrollers and microcomputer for arbitrary data processing
for control and the logic.
 Console or switchboard allows the operator to control incoming calls
 UPS, connecting wiring, cabinets and other housing materials

11. ISDN EPABX SYSTEM :
Integrated Services Digital Network, also
known as ISDN, is a type of telephone system
that carries both voice and data in digital
format (bits) rather than waves.

12. PICTOGRAMS AND BOTTONS :

13. SPIDER EPABX SYSTEM:
 Spider EPABX is the latest in telecommunication,
based on micro-processor technology, in which the
switching matrix is based on CMOS chips
providing high reliability and low power
consumption Plug-in, modular PCB construction
ensures immediate up gradation and repairs

14. SPECIFICATION’S
System Capacity Minimum 8 Lines Maximum 64 Lines
Total
Trunk Line Resistance 600 Ohms 1500 Ohms Max
Dialling Speed 10 pps
Speech Paths 7 Links
Cabling Method 2 Wire System
Input Voltage 220 + - 10% V AC, 50 Hz
Power Consumption Less than 50 Watt

15. SYSTEM DESIGN REQUIREMENTS :
 The operating system of EPABX shall be Linux based with hardened to avoid
any virus attacks.
 Guest House EPABX shall have 48 extensions expandable up to 96 extensions.
 The system shall be equipped with minimum 1 GB RAM and 80 GB HDD.
 The main & guest house EPABX system shall be provided with back-up power
for 8 hrs. Run. Main system shall have the call billing software to get details of
calls made by each extension through EPABX and other features. Other required
software packages for operating and maintaining the system shall be provided.

16. CONDITIONS :
 The main EPABX shall be installed in the EPABX room in administration building and EPABX
for guest house shall be installed in guest house reception area.
 Max. ambient temp -- 45°C
 Min. ambient temp -- 5°C
 Max. R.H. -- 90%
 Min R.H. -- 20%
 Altitude above means sea level -- 1000 mtrs
 POWER SUPPLY - 415 V + 10%, 3-phase, 4 wire, 50Hz + 3%, effectively earthed.

17. FUTURE UPGRADES AND PRICE:
 Upgradability and the cost of expanding the EPABX system needs to
be considered as well.
 Price is another important factor to consider as India is a very price
sensitive market. If you are choosing the cheaper PBX, then it should
not compromise on the quality. There are many supplementary costs
like wiring, power supply backup, battery, rack, etc. Maintenance
costs also need to be taken into account

18. ADVANTAGES OF EPABX SYSTEMS :
 Sharing of Resources
 Easy Programming
 Call transfer
 Call waiting
 Conference call
 Now a days EPABX System offers Alarms,Remainderss for meeting,
appointments, Do Not Disturb (DND) etc.

19. DISADVANTAGE OF EPABX SYSTEM :
 Need careful handling.
 Installed and fixed at one place.
 Maintenance cost is high.
 Required Electricity .

20. APPLICATIONS
 Shopping mall
 Schools and universities
 Call centers
 Information centre

21. CONCLUSION
EPBAX system is the way people communicate with other very easily
but at a fixed place only. Fortunately, new Standards May soon Let us
leave the analog world Behind.