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Sip Component V2 9 For Delphi



How to Use Sip Component V2 9 for Delphi to Create Powerful VoIP Applications




VoIP (Voice over Internet Protocol) is a technology that allows you to make and receive phone calls over the internet. VoIP has many advantages over traditional telephony, such as lower costs, higher quality, more features and more flexibility. VoIP is also widely used for communication and collaboration in various fields and industries.




Sip Component V2 9 For Delphi



If you are a Delphi developer and you want to create VoIP applications, you might be interested in Sip Component V2 9 for Delphi. This is a set of non-visual components that enable you to make and answer phone calls, play and record audio, send and receive DTMF codes, make conference calls and more using the SIP protocol.


In this article, we will show you how to use Sip Component V2 9 for Delphi to create powerful VoIP applications. We will cover the following topics:


  • What is Sip Component V2 9 for Delphi and what are its features?



  • How to install and configure Sip Component V2 9 for Delphi?



  • How to make and answer phone calls with Sip Component V2 9 for Delphi?



  • How to play and record audio with Sip Component V2 9 for Delphi?



  • How to send and receive DTMF codes with Sip Component V2 9 for Delphi?



  • How to make conference calls with Sip Component V2 9 for Delphi?



What is Sip Component V2 9 for Delphi and what are its features?




Sip Component V2 9 for Delphi is a set of components that allow you to use the SIP protocol in your Delphi applications. SIP (Session Initiation Protocol) is a standard protocol for initiating, modifying and terminating multimedia sessions over the internet. SIP is widely used for VoIP, as well as for video conferencing, instant messaging, presence and other applications.


Sip Component V2 9 for Delphi consists of two main components: TSipClient and TSipServer. TSipClient is a component that allows you to act as a SIP user agent, which means you can make and receive phone calls, register with a SIP server, send and receive messages and more. TSipServer is a component that allows you to act as a SIP server, which means you can accept and process requests from SIP clients, manage registrations, authenticate users and more.


Sip Component V2 9 for Delphi has many features, such as:


  • Supports most of the SIP RFCs and drafts



  • Supports IPv4 and IPv6



  • Supports UDP, TCP and TLS transports



  • Supports RTP (Real-time Transport Protocol) for audio streaming



  • Supports SDP (Session Description Protocol) for media negotiation



  • Supports DNS SRV (Service Record) and NAPTR (Naming Authority Pointer) for locating SIP servers



  • Supports REFER (Refer Method) for call transfer



  • Supports REINVITE (Re-Invite Method) for call hold and resume



  • Supports BYE (Bye Method) for call termination



  • Supports CANCEL (Cancel Method) for call cancellation



  • Supports OPTIONS (Options Method) for capability discovery



  • Supports REGISTER (Register Method) for user registration



  • Supports SUBSCRIBE/NOTIFY (Subscribe/Notify Methods) for event notification



  • Supports MESSAGE (Message Method) for instant messaging



  • Supports INFO (Info Method) for sending DTMF codes



  • Supports GRUU (Globally Routable User Agent URIs)



  • Supports TTS (Text-to-Speech)



  • Supports WAV files (PCM 8kHz 16 Bit Mono) for playing and recording audio



  • Supports conference calls



  • Supports multiple simultaneous calls



  • Provides events and properties for easy control and monitoring



  • Provides examples and documentation



How to install and configure Sip Component V2 9 for Delphi?




To install and configure Sip Component V2 9 for Delphi, you need to follow these steps:




  • Extract the zip file and copy the src folder to your Delphi project folder



  • Add the src folder to your Delphi project search path



  • Open your Delphi project and add the IdSipStackInterface unit to your uses clause



  • Drag and drop a TSipClient component and a TSipServer component from the component palette to your form or create them dynamically at runtime



  • Assign the properties of the TSipClient component and the TSipServer component according to your SIP account and preferences. For example, you need to specify the Host, User and Password properties for the TSipClient component and the Port property for the TSipServer component



  • Assign the event handlers of the TSipClient component and the TSipServer component according to your application logic. For example, you need to handle the OnRegistration, OnCall, OnAnswer, OnBye, OnPlayed and OnDtmf events for the TSipClient component and the OnRequest, OnResponse and OnAuthentication events for the TSipServer component



  • Set the Active property of the TSipClient component and the TSipServer component to True to activate them



  • Call the Register method of the TSipClient component to register with your SIP server



How to make and answer phone calls with Sip Component V2 9 for Delphi?




To make and answer phone calls with Sip Component V2 9 for Delphi, you need to follow these steps:


  • To make a phone call, call the Call method of the TSipClient component and pass the phone number or SIP URI of the callee as a parameter. For example: FCall := FSipClient.Call('18025551111');



  • To answer an incoming phone call, handle the OnCall event of the TSipClient component and call the Answer method of the ICall interface that is passed as a parameter. For example: procedure TForm1.SipClientCall(Sender: TObject; const ACall: ICall); begin FCall := ACall; FCall.Answer; end;



  • To end a phone call, call the EndCall method of the ICall interface. For example: FCall.EndCall;



How to play and record audio with Sip Component V2 9 for Delphi?




To play and record audio with Sip Component V2 9 for Delphi, you need to follow these steps:


  • To play an audio file (WAV format) to a phone line, call the PlayFile method of the ICall interface and pass the file name as a parameter. For example: FCall.PlayFile('welcome.wav');



  • To record an audio file (WAV format) from a phone line, call the RecordFile method of the ICall interface and pass the file name as a parameter. For example: FCall.RecordFile('conversation.wav');



  • To play a text message (TTS) to a phone line, call the PlayText method of the ICall interface and pass the text as a parameter. For example: FCall.PlayText('Hello world');



  • To stop playing or recording audio, call the StopPlaying method or the StopRecording method of the ICall interface. For example: FCall.StopPlaying; FCall.StopRecording;



How to send and receive DTMF codes with Sip Component V2 9 for Delphi?




DTMF (Dual-Tone Multi-Frequency) codes are the tones that are generated when you press the keys on a phone keypad. They are used for various purposes, such as navigating menus, entering passwords, dialing extensions and more.


To send and receive DTMF codes with Sip Component V2 9 for Delphi, you need to follow these steps:


  • To send a DTMF code to a phone line, call the SendDtmf method of the ICall interface and pass the code as a parameter. For example: FCall.SendDtmf('1234');



  • To receive a DTMF code from a phone line, handle the OnDtmf event of the TSipClient component and use the Code parameter to get the code. For example: procedure TForm1.SipClientDtmf(Sender: TObject; const ACall: ICall; const Code: String); begin ShowMessage('Received DTMF code: ' + Code); end;



How to make conference calls with Sip Component V2 9 for Delphi?




A conference call is a phone call that involves more than two participants. It is useful for group communication and collaboration.


To make conference calls with Sip Component V2 9 for Delphi, you need to follow these steps:


  • To create a conference call, call the CreateConference method of the TSipClient component and pass the name of the conference as a parameter. For example: FConference := FSipClient.CreateConference('MyConference');



  • To add a participant to a conference call, call the AddParticipant method of the IConference interface and pass the phone number or SIP URI of the participant as a parameter. For example: FConference.AddParticipant('18025552222');



  • To remove a participant from a conference call, call the RemoveParticipant method of the IConference interface and pass the phone number or SIP URI of the participant as a parameter. For example: FConference.RemoveParticipant('18025552222');



  • To end a conference call, call the EndConference method of the IConference interface. For example: FConference.EndConference;



Conclusion




Sip Component V2 9 for Delphi is a powerful and versatile component that allows you to use the SIP protocol in your Delphi applications. It enables you to make and answer phone calls, play and record audio, send and receive DTMF codes, make conference calls and more. It supports most of the SIP RFCs and drafts, as well as IPv4 and IPv6, UDP, TCP and TLS transports, RTP and SDP protocols, DNS SRV and NAPTR records, TTS and WAV files. It provides events and properties for easy control and monitoring, as well as examples and documentation. It is compatible with all Delphi versions starting from Delphi 5 to latest Delphi Tokyo. If you are a Delphi developer and you want to create VoIP applications, you should definitely try Sip Component V2 9 for Delphi and see for yourself what it can do.


How to use Sip Component V2 9 for Delphi with Asterisk?




Asterisk is a free and open source software that provides a framework for building communication applications. Asterisk can act as a SIP server, a PBX, a voicemail system, a conference server and more. Asterisk can be used with Sip Component V2 9 for Delphi to create powerful and flexible VoIP applications.


To use Sip Component V2 9 for Delphi with Asterisk, you need to follow these steps:


  • Download and install Asterisk on your computer or server. You can find the installation instructions and documentation on the official website: https://www.asterisk.org/



  • Configure Asterisk to enable SIP support and create SIP users and extensions. You can find the configuration files and examples in the /etc/asterisk directory. You can also use a web interface such as FreePBX to manage your Asterisk settings.



  • Use the TSipClient component of Sip Component V2 9 for Delphi to connect to your Asterisk server. You need to specify the Host, User and Password properties of the TSipClient component according to your Asterisk settings. For example: FSipClient.Host := 'localhost'; FSipClient.User := '1001'; FSipClient.Password := 'secret';



  • Use the TSipClient component of Sip Component V2 9 for Delphi to make and answer phone calls, play and record audio, send and receive DTMF codes, make conference calls and more with your Asterisk server. You can use the methods and events of the TSipClient component as described in the previous sections.



How to use Sip Component V2 9 for Delphi with other SIP providers?




SIP providers are companies that offer VoIP services over the internet. SIP providers can provide you with a SIP account that allows you to make and receive phone calls, as well as other features such as voicemail, caller ID, call forwarding and more. SIP providers can be used with Sip Component V2 9 for Delphi to create VoIP applications that work over the internet.


To use Sip Component V2 9 for Delphi with other SIP providers, you need to follow these steps:


  • Choose a SIP provider that suits your needs and budget. There are many SIP providers available, such as VOIP BUSTER, NET-VOICE, OVH Telecom, SIPNET and more. You can compare their features and prices on their websites.



  • Sign up for a SIP account from your chosen SIP provider. You will receive a SIP host name, a user name and a password that you will need to use with Sip Component V2 9 for Delphi.



  • Use the TSipClient component of Sip Component V2 9 for Delphi to connect to your SIP provider. You need to specify the Host, User and Password properties of the TSipClient component according to your SIP account settings. For example: FSipClient.Host := 'sipprovider.com'; FSipClient.User := 'myusername'; FSipClient.Password := 'mypassword';



  • Use the TSipClient component of Sip Component V2 9 for Delphi to make and answer phone calls, play and record audio, send and receive DTMF codes, make conference calls and more with your SIP provider. You can use the methods and events of the TSipClient component as described in the previous sections.



Conclusion




Sip Component V2 9 for Delphi is a powerful and versatile component that allows you to use the SIP protocol in your Delphi applications. It enables you to make and answer phone calls, play and record audio, send and receive DTMF codes, make conference calls and more. It supports most of the SIP RFCs and drafts, as well as IPv4 and IPv6, UDP, TCP and TLS transports, RTP and SDP protocols, DNS SRV and NAPTR records, TTS and WAV files. It provides events and properties for easy control and monitoring, as well as examples and documentation. It is compatible with all Delphi versions starting from Delphi 5 to latest Delphi Tokyo. It can be used with Asterisk or other SIP providers to create powerful and flexible VoIP applications over the internet. If you are a Delphi developer and you want to create VoIP applications, you should definitely try Sip Component V2 9 for Delphi and see for yourself what it can do. d282676c82


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