sip ppt edited

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INTEROPERABILITY IN UNIFIED

COMMUNICATIONS USING SIPFinal Year Major Project

Supervisor : Submitted by:

Mr. C.P. Gupta Chirag Golechha

Asso Professor, Gaurav Jain

Department of Computer Engineering Neha AgarwalPriyanka Mahajan

Shikha Vijay

Submitted to:

Department of Computer Engineering

University College of Engineering,RTU, Kota


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PRESENTATION COMPRISES OF:

Introduction to Unified Communications

Introduction to SIP


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Unified communication


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NEED To integrate different communication medium over one

interface.

To minimize communication response time or delay.

One can send a message on one medium and receive the

same message on another medium.

Less bills to worry as all services from a single provider

through a single number.

To maximize work time.


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SESSION INITIATION PROTOCOL (SIP)

SIP is a multimedia session control protocol published

by IETF in 1999

It is a application layer protocol.

Only establishes and tear down the sessions and not

responsible for data transfer.

Supports the following features:

User Location

Users parameter negotiation User availability

Call establishment

Call management


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SIP PROTOCOL STRUCTURE


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SIP Protocol Message Exchange


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Implementation architecture


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STEPS OF IMPLEMENTATION

1. Establishment of SIP Proxy Server (openSIPS).

1.1 Configuration of User agent server.

1.2 Configuration of Proxy server.

1.3 Configuration of Redirect server.

1.4 Configuration of Location server.


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We are implementing two services as

unified service :-

1.VoIP Service

2.Mail Exchange Service


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Architecture to implement Voip service


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For VoIP service steps of implementation are :-

1. Configuration of scripting and routing.

2. Adding authentication.

3. Establishing a GUI for openSIPS.

4. Connecting to PSTN.

5. Integration of media services.

6. Managing accounting and billing.


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[email protected]

[email protected]

[email protected]

Outgoing mail

Fetchmail program

Mail TransferAgent (Postfix

with SASL)

IMAP and POP3

daemon

Squirelmail

web interface

Web

Browser

Send to local user

mail Boxes

Sent Mail

Architecture to implement mail exchange

service


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The main components of mail exchange service are:-

:- Open source software used to retrive

email from a remote POP3, IMAP mail server to

mail transfer agent.

(Postfix with SASL):- It handles

receiving mails addressed directly to our machine,

and sending it to the correct users mailbox, andsending mail out of the machine. SASL stands for

simple authentication security layer.

(IMAP and POP3 Server) :- It provides away for mail user agents to access their mails.

:- It is a web mail package.

5. Browser interface


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AUTHENTICATION

To authenticate SIP requests and save data such as location

and alias tables we have to perform database basedauthentication using AUTH_DB module and to provideMySQL support we have to use DB_MySql module.

The AUTH_DB module exports two functions:

1. www_authorize :This function is used in the REGISTERrequests authentication .

2. proxy_authorize :This function is used in the NON REGISTERrequests ( such as INVITE )authentication .

Now we understand the working of above 2 functions one byone.


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The REGISTER authentication

When Open SIPS receives the REGISTER message, it

checks for the existence of the Authorize header. If it

is not found, it will challenge UAC for the credentialsand exit.

After being challenged, the UAC should send a

REGISTER message with an Authorize header field.


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The INVITE authentication

The first INVITE with a reply containing a message, 407Proxy Authentication Required. This message has theAuthorize header field, containing information about the

digest authentication, such as realm and nonce UAC replies with a new INVITE. Now, the Authorize

header field contains the digest calculated using theusername, password, realm, and nonce calculated using theMD5 algorithm.


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Client Interface

It offers follwing features:

Voice call

Video call Instant messaging

Mail access


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INTRODUCTION TO JAIN SIP

JAIN SIP is the standardized Java interface to

the Session Initiation Protocol for desktop and

server applications.

JAIN SIP enables transaction stateless,

transaction statefull and dialog stateful control

over the protocol.


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SIP PROTOCOL STACK LAYER


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SEQUENCE DIAGRAM JAIN SIP


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JAIN SIP ARCHITECTURE


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Why Jain sip

Provide stack interoperability and application

portability.

Simple to implement and integrate.

Provide full functionality.

Follows the standard RFC.

Open source.


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sip ppt edited

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