Presenter:Nisar Ahmed MemonMuhammad Muzzamil ShaikhAslam Dall

IP PBX (Internet Protocol Private Branch Exchange)

IntroductionProblems & SolutionEquipment UsedSystem Block DiagramWorking ProcessAdvantagesResultsApplicationConclusionFuture WorkReferences

Table Of Contents

Introduction• Build unified communications system (real and non real time)• Open source software platform Elastix Server• Asterisk PBX as the kernel • Portability, Cost effective solution and Flexibility• Integration of hardware and software• Android supported handhelds with the wireless network• PCs connected with both wired LAN and wireless LAN• To design IP based PBX network architectures• To customize efficient and effective Soft Switch• To implement real time and non-real time applications• Design Global network by joining small IP based PBX• Integrate Analog Phone and configure these phone

• Higher charges of calling with respect to distance.• Dedicated line required to complete a call• Limited scalability• Separate Wiring System• Limited Mobility of users• Less Features at a Higher Price• No database

Problems

Solution

IP PBXInternet Protocol Private Branch

Exchange

Main Features

• Voice call• Video call• Voice mail• Voicemail to E-mail• Follow me• IVR• Database system• Easy Network Management

ComparisonPBX IP-PBX

Separate Wiring system Use LAN

Higher operational cost Lower operational costs

Difficult to configure Easy to configure

Complex Management Simpler Management

Less Features More Features

Classical and No Future Future Development

Uses a separate infrastructure Integrates into Data Network

Equipment

Hardware

• PC server• HTC android• Analog telephone• Access Point• A400E+1FXO• Laptop

Software

• Elastix• Wireshark• 3cx phone• Openfire

System Block Diagram

Call Process

Server (Elastix)

Soft Phones

Smart Phone

IP Phone

ATAAnalog Phone

Working Process

• Customization Of server• Configuration–3CX Soft Phone on PC–3CX Soft Phone on android HTC–SIP Account–Voice Call–Video call–Voice mail– IVR(Interactive Voice Response)

Advantages

• No Charges of calling with respect to distance.• No Dedicated line required to complete a call• Great Scalability• No Separate Wiring System• Great Mobility of users• Great Features at a Zero Price• Database

Results

18 38 42 45 58 77 85 88 3330

0.2

0.4

0.6

0.8

1

Packet Loss Analogue Phone

0

Total Packet

Packet

%

Results

6 17 22 48 52 59 69 91 107 119 148 5730

0.2

0.4

0.6

0.8

1

Packet Loss IP Phone

0

Total Packet

Packet

1%

3 14 23 38 39 46 80 85 89 92 4200

0.2

0.4

0.6

0.8

1

1.2

Packet Loss Softphone Mobile

0

Total Packet

Packet

1%

Application

• Education • Banks • Corporate Organization • Business Sector• Hotels • Hospitals

Conclusion

• This model can be implemented in the university campus to provide free voice and video calls.

• The service is secured and allows only the registered user to place calls.

• Quality of Service is not good while communicating phone to any SIP phone, Server Capacity

User CapacityBandwidthCodec

Future Work

•Integration with PSTN Network•Integration with GSM Network•Integration with others Unified Communication Systems•Communication without side SIP network•Telephony Interface Cards•High security for large scale enterprise network

References

Van Meggelen J., Smith J., Madsen L."Asterisk: The Future of Telephony".2nd ed. O’Reilly Media, p.608,2007.

Li Jian, Li Wei, Unified communication and standardization, Telecommunications Network Technology,2009,(07)

Andre du Toit (1992). Private PBX Networks: Cost Effective Communication Solutions in Proc IEEE 3rd AFRICON conference

[Montoro, P. and Casilari, E. (2009). A comparative study of VoIP standards with Asterisk. In Proceedings of the 4th International Conference on Digital Telecommunications, pages 1–6, Colmar, France.

Thank you