Elaborated By : Marwen Atallah

 Supervised by:

Mr. Mohamed KharratMr. Sofiene Khlif

Deployment Of VoIP Services with Asterisk and FreePBX

Tunisian RepublicMinistry of Higher Education, Scientific

Research and Technology

IT departmentMaster Degree in Networks

and Distributed Applications

Schedule

Web programmingMobile application and software design over

several platforms (Android , IOS, Windows Mobile etc…)

Embedded system Development

Challenges: Mobile and Web Applications may require

communication services

Customers demand deployment of Telephony solutions: call centers, agencies, companies etc…

Goals : Deployment of an efficient Telephony solution that

provides:

Audio-conferencing call distribution Voice-mailing Instant messaging (IM) Queues holding …

simple way to manage, control and secure all the conmmunication traffics happening between users.

VOIP PSTN

+ Better voice quality+ Save a lot of money + Large bandwidth (more features )+ Cheap user hardware and software

- High cost- Low voice quality - Sensitivity to external disturbances

VoIP Solution ( Voice Over Internet Proctocol)

VoIP / PSTN

VoIP Diagram

PBX ? A PBX (Private Branch Exchange) is a system that connects telephone extensions to the Public Switched Telephone Network (PSTN) and provides internal communication for a business.

An IP PBX is a PBX with Internet Protocol connectivity and may provide additional audio, video, or instant messaging communication utilizing the TCP/IP protocol stack.

Client/Server Architecture

PBX [SERVER]

End points (extensions) [Clients]

- Mobilephones - IP Phones - SIP Phones- Any device that supports VoIP application

Survey On Existing Systems

Open-Source

Closed-Source

License&

COST

Open Source Freely available (except for some commercial modules) Freely upgradable

Pay a license for every extension on the system Phones are more expensive 20% - 30% of the system total cost are yearly paid for Annual support from a Cisco partner Upgrades requires purchasing a new software version

Voice Mails

Free and improved voicemail system Included with asterisk installation Voicemail to Email ?

 Uses « Unity voicemail » system that relies on a Microsoft Exchange mail system Buy Microsoft exchange licenses for each voicemail box Voicemail administration is seperate from the System

Accessibility

Highly customizable Solution and open architecture Accessibility over different operating systems Adjustable to almost all type of phones

Limited accessibility Works with specific type of phones

maintenance

Debugging and Fixing are accessible and doesn’t require high expertise Asterisk Users can contribute on Asterisk improvement

Contact CISCO agents or technical support

Asterisk is an open source private automatic branch exchange (PABX) for UNIX systems. Among other uses, it provides for voice messaging,, hold music, enquiry calls, call distribution and conference calls, etc…

Asterisk PBX distibutes incoming calls to teams of agents assigned to various call queues.

Holding Queues Calls Distribution

Asterisk Applications: Call Center

Asterisk Applications: VoIP Gateways

Asterisk builds a bridge between external telephony lines (PSTN) and the VoIP

Asterisk Applications: Conference Bridge

A conference bridge allows a group of people to participate in phone call Meeting rooms can hold dozens or even hundreds of participants

Server Deployement

Commands have to be typed precisely. If there’s a spelling error, command will fail

For someone who has never used CLI, it can be very confusing

Learn a Large amount of commands (hundreds) by heart

Asterisk (CLI)

Server Deployement

PBX ( Telephony Engine)

Web-based Graphical User Interfaces For Asterisk(dashboard) :

• Web-Based Administration: manage and control Asterisk system, using web browsers from any device

• Built-in Call Reporting: real time basic call reporting included with FreePBX

Web-based configuration GUI for asterisk.Core telephony engine

Deployment

essAsterisk Telepho

ny Engine

FreePBXUbuntu

12.04

Install Ubuntu 12.04 Server LTS 32 or 64-bit

Initial System SetupInstall DependenciesInstall and Configure AsteriskInstall and Configure FreePBXStart FreePBX

FreePBX (CLI)

FreePBX (GUI)

192.168.1.90

FreePBX (GUI) : Access

Clients: SIP extentions

SIP Client: A SIP client (Soft Phone) plays the role of an IP telephone but as a software

Zoiper

Softphone: Software that allows SIP based phone calls from a computer, smartphones

Conclusion / Perspectives

The goal of this work was to deploy a Voice over IP solution for Karwisoft Company, by installing an advanced and inexpensive telephony system using one of the leading open-source PABXs in the world, Asterisk.

The execution of this project required the contribution of many components since it’s a client-server based architecture that offers many telephony features that can be deployed in many fields…

Asterisk Over Cloud

Why would we want to run the server in the cloud?

In-house Solution

In-house solutions requires specialized server knowledge Expensive ( thousands of dollars ) Space, cables and wires

Cloud Solution

Lower upfront capital costsPay for the server as you use it ( scalability) Run it in under an hour. auto-maintaned and 24/24 available

What is an Amazon EC2 ?virtual machine web service that provides dynamic resizable compute capacity in the cloud.

SIP (Session Initiation Protocol)

Asterisk is using a set of VoIP Protocols Such as SIP

SIP is responsible for connecting, monitoring and disconnecting VoIP sessions.

SIP can establish real-time sessions such as online gaming, teleconferencing and video conferencing.