how to generate barcode in vb.net 2010 Structure of the SIP Protocol in Software

Encoding ANSI/AIM Code 39 in Software Structure of the SIP Protocol

Structure of the SIP Protocol
USS Code 39 Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Draw Code 39 In None
Using Barcode maker for Software Control to generate, create USS Code 39 image in Software applications.
UAC REQUEST 2 xx RESPONSE ACK
Scanning Code 3 Of 9 In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Code 39 Extended Creation In C#.NET
Using Barcode creation for VS .NET Control to generate, create Code39 image in Visual Studio .NET applications.
Dialog established
USS Code 39 Generation In .NET Framework
Using Barcode creator for ASP.NET Control to generate, create Code39 image in ASP.NET applications.
Code 3 Of 9 Printer In Visual Studio .NET
Using Barcode creator for VS .NET Control to generate, create Code39 image in Visual Studio .NET applications.
Handshake
Encoding Code 3/9 In Visual Basic .NET
Using Barcode creator for .NET Control to generate, create ANSI/AIM Code 39 image in VS .NET applications.
EAN13 Encoder In None
Using Barcode drawer for Software Control to generate, create EAN13 image in Software applications.
CONVERSATION BYE 200 OK
Barcode Generation In None
Using Barcode generator for Software Control to generate, create bar code image in Software applications.
Data Matrix ECC200 Generator In None
Using Barcode creator for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
Establishment of a dialog
Encoding GS1-128 In None
Using Barcode maker for Software Control to generate, create EAN / UCC - 13 image in Software applications.
UPC-A Supplement 5 Drawer In None
Using Barcode drawer for Software Control to generate, create GTIN - 12 image in Software applications.
The offer therefore carries the description of the session, including the encoding methods, required media support, and any other support required for the session at the receiving end. The offer may or may not be contained in the initial request, but carried in a subsequent response. The offer is then followed by an answer. Each entity involved in the session must provide an answer to the offer. The answer in essence is accepting the offer and acknowledging it can support the requirements specified in the offer. If no requirements were specified in the offer, the answer may contain requirements. The offer and the answer use specific methods. A method in SIP parlance is a message type. There are two forms of SIP messaging: the SIP request and the SIP response.
Create Ames Code In None
Using Barcode encoder for Software Control to generate, create Code-27 image in Software applications.
UPCA Maker In Java
Using Barcode generator for BIRT Control to generate, create UPC-A Supplement 5 image in Eclipse BIRT applications.
Requests
Read Data Matrix ECC200 In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
2D Barcode Printer In VS .NET
Using Barcode creator for ASP.NET Control to generate, create Matrix Barcode image in ASP.NET applications.
A request is sent from a SIP client to a SIP server. A SIP server could support any type of function. Remember these are logical entities rather than physical entities. The request format consists of a start line containing the following information:
Bar Code Generation In Objective-C
Using Barcode maker for iPhone Control to generate, create bar code image in iPhone applications.
Scanning Barcode In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
METHOD (space) REQUEST URI (space) SIP VERSION (crlf)
Scan EAN13 In Visual Basic .NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
European Article Number 13 Maker In Java
Using Barcode drawer for Java Control to generate, create GS1 - 13 image in Java applications.
The METHOD identifies the type of request being sent. There are several different methods supported. There are sometimes other methods defined by various vendors, referred to as extensions. Those are discussed later. The standard SIP methods are as follows:
REGISTER INVITE
Used to register a user
Used to invite a user to a session
2
ACK BYE INFO
Acknowledges receipt of a request when setting up a session Cancels a transaction Queries servers about their capabilities Used for the support of short message service and instant messaging Terminates a session or transaction Used to exchange mid-call information such as dialed digits Used to notify entities subscribed to event notification of registration Used to subscribe to event notification
CANCEL OPTIONS MESSAGE NOTIFY updates
SUBSCRIBE
UPDATE Allows a device to update session information during a session without sending a re-invite
The REQUEST-URI is explained later in this chapter, in the section SIP Identities. Addresses in a SIP network are referred to as Universal Resource Identifiers (URIs). These are very much like Universal Resource Locators (URLs) used in the HTTP protocol (the Web addresses we have come so familiar with). The REQUEST-URI is used for routing the SIP message through the network, so therefore it contains the address of the next hop. Last but not least in the request message is the SIP VERSION. This identifies the version of SIP that is being supported by the transaction user that created the SIP message. This allows the receiving entity of a request to understand what version of SIP was used to create the request, so it can decode the request properly. A typical request start line may look like
INVITE sip:russell@tekelec.com SIP/2.0
Following the start line in a request are the message header (or headers), a carriage return line feed (CRLF), and an optional message body. Header fields and the message body are described in a later section. So the request identifies the type of session that is being requested by the user agent client. The requirements for supporting the session (such as the type of media, how it is encoded, and what other methods must be supported) are included as part of the request. There are requests that are specific to certain types of sessions. A good example of this is the MESSAGE method, which carries a text message. No session and dialog are needed, since the contents are provided in the message body. The recipient can choose to accept the message or not through a response.
Responses
Responses are sent by a SIP server to a client in response to a request. Responses are identified by the receiving entity by the status line, which is formatted differently than a request start line. The response status line contains the following information:
SIP VERSION (space) STATUS CODE (space) REASON PHRASE (crlf)
Copyright © OnBarcode.com . All rights reserved.