IPPhone Component

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The IPPhone component can be used to implement a software-based phone.

Syntax

nsoftware.IPWorksVoIP.Ipphone

Remarks

The IPPhone component can be used to implement a software-based phone utilizing modern Voice over Internet Protocol (VoIP) technology. This softphone is able to perform many different functions of a traditional telephone, such as making and receiving calls, performing blind and attended transfers, placing calls on hold, establishing and joining conferences, and more.

Registration

To begin, the first step is activating, or registering, the component. The Server, Port, User, and Password properties must be set to the appropriate values to register with your SIP server/provider. After these values are set, call Activate. If the component has successfully activated/registered, the Activated event will fire and Active will be set to true. The component will now be able to make/receive phone calls. For example:

component.OnActivated += (o, e) => { Console.WriteLine("Activation Successful"); }; component.User = "sip_user"; component.Password = "sip_password"; component.Server = "sip_server"; component.Port = 5060 // Default, 5061 is typical for SSL/TLS component.Activate(); Additionally, it's important to note that the registration of a SIP client will expire if not refreshed. The expiration time is negotiated with the server when registering. By default, the component will attempt to negotiate a value of 60 seconds. This value can be changed via the RegistrationInterval configuration. Note this is merely a suggestion to the server, and the server can change this accordingly. If the server does change this, after registration is complete, RegistrationInterval will be updated.

To prevent the registration from expiring, the component will refresh the registration within DoEvents, when needed. To ensure this occurs, we recommend calling DoEvents frequently. In a form-based application, we recommend doing so within a timer. For example, this could look something like:

private void timer1_Tick(object sender, EventArgs e) { component.DoEvents(); } private System.Windows.Forms.Timer timer1; timer1.Interval = 1000; timer1.Tick += new System.EventHandler(this.timer1_Tick); timer1.Enabled = true;

Note that in console applications, you must call DoEvents in a loop in order to provide accurate message processing, in addition to this case.

Security

By default, the component operates in plaintext for both SIP signaling and RTP (audio) communication. To enable completely secure communication using the component, both SIPS (Secure SIP) and SRTP (Secure RTP) must be enabled.

Enable SIPS

To enable SIPS (Secure SIP, or SIP over SSL/TLS), the SIPTransportProtocol property must be set to 2 (TLS). The Port property will typically need to be set to 5061 (this may vary). Additionally, the SSLServerAuthentication event must be handled, allowing users to check the server identity and other security attributes related to server authentication. Once this is complete, the component can then be activated. All subsequent SIP signaling will now be secured. For example:

component.OnSSLServerAuthentication += (o, e) => { if (!e.Accept) { if (e.CertSubject == "SIPS_SAMPLE_SUBJECT" && e.CertIssuer == "SIPS_CERT_ISSUER") { e.Accept = true; } } }; // Enable SIPS component.SIPTransportProtocol = 2; // TLS component.User = "sip_user"; component.Password = "sip_password"; component.Server = "sip_server"; component.Port = 5061; // 5061 is typical for SSL/TLS component.Activate();

Information related to the SSL/TLS handshake will be available within the SSLStatus event with the prefix [SIP TLS].

Enable SRTP

While the above process secures SIP signaling, it does not secure RTP (audio) communication. The RTPSecurityMode property can be used to specify the security mode that will be used when transmitting RTP packets. By default, this property is 0 (None), and RTP packets will remain unencrypted during communication with the remote party.

To ensure the audio data is encrypted and SRTP is enabled, the RTPSecurityMode must be set to either of the following modes: 1 (SDES), or 2 (DTLS-SRTP). The selected mode will be used to securely derive a key used to encrypt and decrypt RTP packets, enabling secure audio communication with the remote party. The appropriate mode to use may depend on the service provider and configuration of a particular User. For example:

component.OnSSLServerAuthentication += (o, e) => { if (!e.Accept) { if (e.CertSubject == "SIPS_SAMPLE_SUBJECT" && e.CertIssuer == "SIPS_CERT_ISSUER") { e.Accept = true; } } }; component.RTPSecurityMode = 1; // Enable SRTP (SDES) //component.RTPSecurityMode = 2; // Enable SRTP (DTLS-SRTP) component.SIPTransportProtocol = 2; // TLS component.User = "sip_user"; component.Password = "sip_password"; component.Server = "sip_server"; component.Port = 5061; // 5061 is typical for SSL/TLS component.Activate(); component.Dial("123456789", "", true);

Note it is highly recommended that SIPTransportProtocol is set to TLS when enabling SRTP. Additionally, if SRTP is enabled, the remote party must support the selected mode, otherwise no call will be established.

Audio Setup

While not required to function, you may set the microphone and speaker for the component to use during calls. First, you must call ListMicrophones and ListSpeakers. Doing so will populate the Microphones collection and the Speakers collection. Once this is done, you can set these devices via SetMicrophone and SetSpeaker given their device name. For example:

ipphone1.ListMicrophones(); ipphone1.ListSpeakers(); foreach (Speaker s in ipphone1.Speakers) { Console.WriteLine("Speaker Name: " + s.Name); } foreach (Microphone m in ipphone1.Microphones) { Console.WriteLine("Microphone Name: " + m.Name); } ipphone1.SetSpeaker(ipphone1.Speakers[0].Name); ipphone1.SetMicrophone(ipphone1.Microphones[0].Name);

Managing Calls

All incoming and outgoing calls currently recognized by the component will be stored in the Calls collection. These connections will be initiated or accepted through the interface identified by LocalHost and LocalPort.

Incoming Calls

After successful activation, incoming calls will be detected, and IncomingCall will fire for each call. Within this event, Answer, Decline, or Forward can be used to handle these calls. For example:

ipphone1.OnIncomingCall += (o, e) => { ipphone1.Answer(e.CallId); };

Outgoing Calls

To make an outgoing call, you must use Dial. This method takes three parameters: the user you wish to call, your caller ID (optional), and a boolean that determines whether the method will connect synchronously (True) or asynchronously (False). If set, the second parameter will cause P-Asserted-Identity headers (RFC 3325) to be sent in requests to the server. If left as an empty string, this header will not be sent. Dial will return a call identification string (Call-ID) that is unique to the call. After the method returns successfully, the call will be added to the Calls collection.

Please see the method description for detailed examples on using Dial synchronously and asynchronously.

Transferring Calls

Basic (Blind) Transfers

Basic transfers are very simple to perform. First, the user establishes a call with the number they will be transferring (transferee). After the call is established, the user can transfer the call to the appropriate number (transfer target). The call will then be removed. For example:

string callId = ipphone1.Dial("123456789", "", true); // Establish call with transferee, hold if needed //ipphone1.Hold(callId); ipphone1.Transfer(callId, "number");

Attended Transfers

Typically, attended transfers are used to manually check if the "number" they are transferring to (transfer target) is available for a call, provide extra information about the call, etc., before transferring. In addition to establishing a call with the transferee, the component must also establish a call with the transfer target. Once both calls are active, you may perform an attended transfer by calling Transfer at any moment. Afterwards, a session will be established between both calls, and they will be removed. Note that Transfer must be used with the callId of the call you wish to transfer (transferee) and the number of the call you wish to transfer to (transfer target). For example:

string callId1 = ipphone1.Dial("123456789", "", true); // Establish call with Transferee, hold if needed //ipphone1.Hold(callId1); string callId2 = ipphone1.Dial("number", "", true); // Establish call with Transfer Target, hold if needed //ipphone1.Hold(callId2); ipphone1.Transfer(callId1, "number");

Note in these examples, Hold can be used to place a call on hold before a transfer. This is optional.

Audio Playback

PlayFile can be used to play audio from a WAV file to a specific call. PlayText can also be used to play audio, but will do so using Text-to-Speech. Once audio has finished playing, Played will fire.

PlayBytes can be used to play audio, but will do so in an event-based manner. The behavior of PlayBytes is very different from the previous two methods. For a detailed description on how to use this method with the Played event, please see the method and event descriptions.

Recording Audio

Ongoing calls can be recorded using StartRecording. The audio can be recorded directly to a WAV file by specifying the filename parameter. Additionally, if the filename parameter is not specified, the audio will be recorded internally, and made available once the recording is finished. The recorded data will be available within the Record event.

Note in both scenarios, the recording will end either when the call is terminated, or StopRecording is called. The recorded audio will have a sampling rate of 8 kHz and a bit depth of 16 bits per sample (PCM 8 kHz 16-bit format).

Example: Using the 'Record' event

MemoryStream recordStream = new MemoryStream(); phone.StartRecording("callId", ""); phone.OnRecord += (o, e) => { recordStream.Write(e.RecordedDataB, 0, e.RecordedDataB.Length); File.WriteAllBytes(recordFile, recordStream.ToArray()); };

Conferencing

The component also supports conferencing. A call can join a conference using the JoinConference method, passing in the callId of the call and the custom conferenceId. If the conferenceId does not exist, then a new conference will be created given this ID. Other calls can then join the existing conference with this same ID.

To monitor existing conferences, the ListConferences method will return a string containing all ongoing conferences and calls within each conference. This value will have the following format:

ConferenceId_1: CallId_1, CallId_2

...

ConferenceId_n: CallId_3, CallId_4, CallId_5, ...

At any moment, a call can be removed from a conference using LeaveConference. If the user is the last call within the conference, then the conference will be removed.

Call Termination

Ongoing calls are terminated by passing the appropriate Call-ID to Hangup. All ongoing calls can be terminated with HangupAll. When a call has been terminated (by either party), CallTerminated will fire. It's important to note that in the case where an outgoing call is never answered, the component will attempt to leave a voicemail. The voicemail will end once Hangup or HangupAll is called, and CallTerminated will fire.

Property List

The following is the full list of the properties of the component with short descriptions. Click on the links for further details.

Method List

The following is the full list of the methods of the component with short descriptions. Click on the links for further details.

Event List

The following is the full list of the events fired by the component with short descriptions. Click on the links for further details.

Config Settings

The following is a list of config settings for the component with short descriptions. Click on the links for further details.

Active Property (IPPhone Component)

The current activation status of the component.

Syntax

• C#
• VB.NET

public bool Active { get; }

Public ReadOnly Property Active As Boolean

Default Value

False

Remarks

This property indicates the activation status of the component. Active will be True if the component has been successfully activated (registered) with the SIP Server, and False otherwise. If False, the component is not registered and will not be able to make or receive calls.

The component can be activated via Activate and deactivated through Deactivate.

This property is read-only and not available at design time.

Calls Property (IPPhone Component)

A collection of calls.

Syntax

• C#
• VB.NET

public CallList Calls { get; }

Public ReadOnly Property Calls As CallList

Remarks

This collection holds data for each incoming and outgoing Call recognized by the component.

This property is read-only and not available at design time.

LocalHost Property (IPPhone Component)

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

• C#
• VB.NET

public string LocalHost { get; set; }

Public Property LocalHost As String

Default Value

""

Remarks

The LocalHost property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multi-homed hosts (machines with more than one IP interface) setting LocalHost to the value of an interface will make the component initiate connections (or accept in the case of server components) only through that interface.

If the component is connected, the LocalHost property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multi-homed hosts (machines with more than one IP interface).

NOTE: LocalHost is not persistent. You must always set it in code, and never in the property window.

LocalPort Property (IPPhone Component)

The UDP port in the local host where UDP binds.

Syntax

• C#
• VB.NET

public int LocalPort { get; set; }

Public Property LocalPort As Integer

Default Value

0

Remarks

The LocalPort property must be set before UDP is activated (Active is set to True). It instructs the component to bind to a specific port (or communication endpoint) in the local machine.

Setting it to 0 (default) enables the TCP/IP stack to choose a port at random. The chosen port will be shown by the LocalPort property after the connection is established.

LocalPort cannot be changed once the component is Active. Any attempt to set the LocalPort property when the component is Active will generate an error.

The LocalPort property is useful when trying to connect to services that require a trusted port in the client side.

Microphones Property (IPPhone Component)

A collection of microphones.

Syntax

• C#
• VB.NET

public MicrophoneList Microphones { get; }

Public ReadOnly Property Microphones As MicrophoneList

Remarks

This collection holds data for each Microphone detected on the system. Calling ListMicrophones will populate this collection.

This property is read-only and not available at design time.

Password Property (IPPhone Component)

The password that is used when connecting to the SIP Server.

Syntax

• C#
• VB.NET

public string Password { get; set; }

Public Property Password As String

Default Value

""

Remarks

This property contains the password of the client attempting to connect to the SIP Server. This value will be used when activating the component via Activate.

This property is not available at design time.

Port Property (IPPhone Component)

The port on the SIP server the component is connecting to.

Syntax

• C#
• VB.NET

public int Port { get; set; }

Public Property Port As Integer

Default Value

5060

Remarks

This property specifies the port on the SIP server that the component will connect to. This value will be used when activating the component via Activate.

RTPSecurityMode Property (IPPhone Component)

Specifies the security mode that will be used when transmitting RTP.

Syntax

• C#
• VB.NET

public IpphoneRTPSecurityModes RTPSecurityMode { get; set; }

enum IpphoneRTPSecurityModes {
  etNone,
  etSDES,
  etDTLS
}

Public Property RTPSecurityMode As IpphoneRTPSecurityModes

Enum IpphoneRTPSecurityModes
  etNone
  etSDES
  etDTLS
End Enum

Default Value

0

Remarks

This property is used to specify the security mode that will be used when transmitting RTP (audio data). Possible modes are:

By default, the security mode will be 0 (None), and RTP packets will remain unencrypted during communication with the remote party. To enable SRTP (Secure RTP), the security mode must be set to either: 1 (SDES), or 2 (DTLS).

When SRTP is enabled, the selected mode will be used to securely derive a key used to encrypt and decrypt RTP packets, enabling secure audio communication with the remote party. The appropriate mode to use may depend on the service provider and configuration of a particular User. Additionally, if SRTP is enabled, the remote party must support the selected mode, otherwise no call will be established.

Note it is highly recommended that SIPTransportProtocol is set to TLS when enabling SRTP.

Server Property (IPPhone Component)

The address of the SIP Server.

Syntax

• C#
• VB.NET

public string Server { get; set; }

Public Property Server As String

Default Value

""

Remarks

This property contains the address of the SIP Server the component will attempt to connect to. This value will be used when activating the component via Activate.

SIPTransportProtocol Property (IPPhone Component)

Specifies the transport protocol the component will use for SIP signaling.

Syntax

• C#
• VB.NET

public IpphoneSIPTransportProtocols SIPTransportProtocol { get; set; }

enum IpphoneSIPTransportProtocols {
  tpUDP,
  tpTCP,
  tpTLS
}

Public Property SIPTransportProtocol As IpphoneSIPTransportProtocols

Enum IpphoneSIPTransportProtocols
  tpUDP
  tpTCP
  tpTLS
End Enum

Default Value

0

Remarks

This property specifies which transport protocol (UDP, TCP, TLS) the component will use for SIP signaling and can be used to enable SIPS (Secure SIP). Note it is important to set the SIPTransportProtocol property before setting any additional properties and configurations.

This value is 0 (UDP) by default. Possible values are:

Note when TLS is specified, the Port will typically need to be set to 5061.

Speakers Property (IPPhone Component)

A collection of speakers.

Syntax

• C#
• VB.NET

public SpeakerList Speakers { get; }

Public ReadOnly Property Speakers As SpeakerList

Remarks

This collection holds data for each Speaker detected on the system. Calling ListSpeakers will populate this collection.

This property is read-only and not available at design time.

SSLAcceptServerCert Property (IPPhone Component)

Instructs the component to unconditionally accept the server certificate that matches the supplied certificate.

Syntax

• C#
• VB.NET

public Certificate SSLAcceptServerCert { get; set; }

Public Property SSLAcceptServerCert As Certificate

Remarks

If it finds any issues with the certificate presented by the server, the component will normally terminate the connection with an error.

You may override this behavior by supplying a value for SSLAcceptServerCert. If the certificate supplied in SSLAcceptServerCert is the same as the certificate presented by the server, then the server certificate is accepted unconditionally, and the connection will continue normally.

Please note that this functionality is provided only for cases where you otherwise know that you are communicating with the right server. If used improperly, this property may create a security breach. Use it at your own risk.

This property is not available at design time.

SSLCert Property (IPPhone Component)

The certificate to be used during SSL negotiation.

Syntax

• C#
• VB.NET

public Certificate SSLCert { get; set; }

Public Property SSLCert As Certificate

Remarks

The digital certificate that the component will use during SSL negotiation. Set this property to a valid certificate before starting SSL negotiation. To set a certificate, you may set the Encoded field to the encoded certificate. To select a certificate, use the store and subject fields.

This property is not available at design time.

User Property (IPPhone Component)

The username that is used when connecting to the SIP Server.

Syntax

• C#
• VB.NET

public string User { get; set; }

Public Property User As String

Default Value

""

Remarks

This property contains the username of the client attempting to connect to the SIP Server. This value will be used when activating the component via Activate.

This property is not available at design time.

Activate Method (IPPhone Component)

Activates the component.

Syntax

• C#
• VB.NET

public void Activate();

Public Sub Activate()

Remarks

This method is used to activate the component by registering to a SIP Server specified in the Server and Port properties. The username and password of the SIP Server must be provided via User and Password properties for authorization, if applicable.

Example: ipphone.User = "MyUsername"; ipphone.Password = "MyPassword"; ipphone.Server = "HostNameOrIP"; ipphone.Port = 5060; ipphone.Activate(); Upon successful activation, the Activated event will fire.

Answer Method (IPPhone Component)

Answers an incoming phone call.

Syntax

• C#
• VB.NET

public void Answer(string callId);

Public Sub Answer(ByVal callId As String)

Remarks

This method can be used to answer an incoming phone call, specified by callId. This method can be used in conjunction with the IncomingCall event, for example: ipphone.onIncomingCall += (sender, e) => { ipphone.Answer(e.CallId); }; If successful, CallReady will fire.

Config Method (IPPhone Component)

Sets or retrieves a configuration setting.

Syntax

• C#
• VB.NET

public string Config(string configurationString);

Public Function Config(ByVal ConfigurationString As String) As String

Remarks

Config is a generic method available in every component. It is used to set and retrieve configuration settings for the component.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the component, access to these internal properties is provided through the Config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

Deactivate Method (IPPhone Component)

Deactivates the component.

Syntax

• C#
• VB.NET

public void Deactivate();

Public Sub Deactivate()

Remarks

This method is used to unregister the component from the SIP Server. If deactivation is successful, Deactivated will fire.

Decline Method (IPPhone Component)

Declines an incoming phone call.

Syntax

• C#
• VB.NET

public void Decline(string callId);

Public Sub Decline(ByVal callId As String)

Remarks

This method can be used to decline an incoming phone call, specified by callId. This method can be used in conjunction with the IncomingCall event, for example: ipphone.onIncomingCall += (sender, e) => { ipphone.Decline(e.CallId); };

Dial Method (IPPhone Component)

Used to make a call.

Syntax

• C#
• VB.NET

public string Dial(string number, string callerNumber, bool wait);

Public Function Dial(ByVal number As String, ByVal callerNumber As String, ByVal wait As Boolean) As String

Remarks

This method is used to make a call to a particular user, given by number. This method should only be called after the component has been successfully activated via Activate. Initially, the OutgoingCall event will fire after calling this method. DialCompleted may fire when the dial process is complete. If successful, CallReady will fire after the outgoing call has been answered, declined, or ignored. If the call is declined or ignored, the component will be sent to voicemail, which can be ended with Hangup.

The callerNumber parameter specifies the optional caller ID. If given, the P-Asserted-Identity Header, specified in RFC 3325, will be sent in requests to the connected SIP Server. If left as an empty string, this header will not be sent.

The wait parameter specifies whether the component should connect synchronously or asynchronously to the call. If True, the component will connect synchronously, and won't return until the call has been answered, declined, or ignored. If False, the component will connect asynchronously. The call's status can be checked through various events, such as OutgoingCall, CallReady, and CallStateChanged, or found in the call's State field. Exceptions throughout the call process will be reported in DialCompleted, along with other call details.

NOTE: This method will return the CallId field of the call. This returned value may not always reflect the accurate CallId. In the case that wait is true, this method will always return the accurate value. In the case that wait is false, the returned value may not be accurate if the outgoing call is forwarded, or redirected, as the component must change this field. Both the updated and original CallId will be present within the DialCompleted event. Any references to the original CallId must be updated accordingly. Please see DialCompleted for more details. The below examples assume the outgoing call has been answered:

Example: "wait" is true string callId = ""; bool connected = false; ipphone.OnCallReady += (sender, e) => { connected = true; } try { callId = ipphone.Dial("123456789", "", true); } catch (IPWorksVoIPException e) { MessageBox.Show(e.Code + ": " + e.Message); } if (connected) { ipphone.PlayText(callId, "Hello"); } Example: "wait" is false bool connected = false; string callId = ""; ipphone.OnDialCompleted += (sender, e) => { if (e.ErrorCode != 0) { MessageBox.Show(e.ErrorCode + ": " + e.Description); // Handle error } if (e.OriginalCallId != e.CallId) { callId = e.CallId; // Update callId if redirect occurred } } ipphone.OnCallReady += (sender, e) => { connected = true; } string callId = ipphone.Dial("123456789", "", false); ... ... ... // Somewhere else... if (connected) { ipphone.PlayText(callId, "Hello"); }

DoEvents Method (IPPhone Component)

Processes events from the internal message queue.

Syntax

• C#
• VB.NET

public void DoEvents();

Public Sub DoEvents()

Remarks

When DoEvents is called, the component processes any available events. If no events are available, it waits for a preset period of time, and then returns.

Forward Method (IPPhone Component)

Used to forward an incoming call.

Syntax

• C#
• VB.NET

public void Forward(string callId, string number);

Public Sub Forward(ByVal callId As String, ByVal number As String)

Remarks

This method can be used to implement call forwarding, allowing incoming calls, given by callId to be forwarded to a particular user specified by number. This method can be used in conjunction with the IncomingCall event, for example: ipphone.onIncomingCall += (sender, e) => { ipphone.Forward(e.CallId, "123456789"); };

Hangup Method (IPPhone Component)

Used to hang up a specific call.

Syntax

• C#
• VB.NET

public void Hangup(string callId);

Public Sub Hangup(ByVal callId As String)

Remarks

This method is used to terminate a specific call, specified by callId. After the call has been successfully terminated, CallTerminated will fire.

HangupAll Method (IPPhone Component)

Used to hang up all calls.

Syntax

• C#
• VB.NET

public void HangupAll();

Public Sub HangupAll()

Remarks

This method is used to terminate all calls currently in the Calls collection. CallTerminated will fire for each successfully terminated call.

Hold Method (IPPhone Component)

Places a call on hold.

Syntax

• C#
• VB.NET

public void Hold(string callId);

Public Sub Hold(ByVal callId As String)

Remarks

This method is used to place a call, specified by callId, on hold.

JoinConference Method (IPPhone Component)

Adds a call to a conference call.

Syntax

• C#
• VB.NET

public void JoinConference(string callId, string conferenceId);

Public Sub JoinConference(ByVal callId As String, ByVal conferenceId As String)

Remarks

This method is used to add a call, specified by callId, to a conference call.

The conferenceId parameter specifies the unique ID of the conference call. If no conference ID exists, the component will start a new conference call with this ID.

LeaveConference Method (IPPhone Component)

Removes a call from a conference call.

Syntax

• C#
• VB.NET

public void LeaveConference(string callId);

Public Sub LeaveConference(ByVal callId As String)

Remarks

This method is used to remove a call, specified by callId, from a conference call. If the call is not a part of any conference call, an exception will be thrown.

ListConferences Method (IPPhone Component)

Lists ongoing conference calls.

Syntax

• C#
• VB.NET

public string ListConferences();

Public Function ListConferences() As String

Remarks

This method is used to list ongoing conferences any of the component's calls are currently a part of. Calling this will return a string with the following format:

ConferenceId_1: CallId_1, CallId_2

...

ConferenceId_n: CallId_3, CallId_4, CallId_5, ...

ListMicrophones Method (IPPhone Component)

Lists all microphones detected on the system.

Syntax

• C#
• VB.NET

public void ListMicrophones();

Public Sub ListMicrophones()

Remarks

This method lists all microphones detected on the system. Calling this method will populate the Microphones collection.

ListSpeakers Method (IPPhone Component)

Lists all speakers detected on the system.

Syntax

• C#
• VB.NET

public void ListSpeakers();

Public Sub ListSpeakers()

Remarks

This method lists all speakers detected on the system. Calling this method will populate the Speakers collection.

MuteMicrophone Method (IPPhone Component)

Used to mute or unmute the microphone for a specified call.

Syntax

• C#
• VB.NET

public void MuteMicrophone(string callId, bool mute);

Public Sub MuteMicrophone(ByVal callId As String, ByVal mute As Boolean)

Remarks

This method can be used to either mute or unmute the microphone for a specified call, given by callId. When mute is true, the microphone will be muted for the call. When false, the microphone will be unmuted.

MuteSpeaker Method (IPPhone Component)

Used to mute or unmute the speaker for a specified call.

Syntax

• C#
• VB.NET

public void MuteSpeaker(string callId, bool mute);

Public Sub MuteSpeaker(ByVal callId As String, ByVal mute As Boolean)

Remarks

This method can be used to either mute or unmute the speaker for a specified call, given by callId. When mute is true, the speaker will be muted for the call. When false, the speaker will be unmuted.

Ping Method (IPPhone Component)

Used to ping the server.

Syntax

• C#
• VB.NET

public void Ping(int timeout);

Public Sub Ping(ByVal timeout As Integer)

Remarks

This method is used to ping the SIP server by sending an OPTIONS request. If no server response is received by the component in timeout seconds, Ping will throw an error.

Note this method is only applicable when the component is active.

PlayBytes Method (IPPhone Component)

This method is used to play bytes to a call.

Syntax

• C#
• VB.NET

public void PlayBytes(string callId, byte[] bytesToPlay, bool lastBlock);

Public Sub PlayBytes(ByVal callId As String, ByVal bytesToPlay As String, ByVal lastBlock As Boolean)

Remarks

This method is used to play bytes to a call, specified by the callId parameter. These bytes are expected to have a sampling rate of 8 kHz and a bit depth of 16 bits per sample (PCM 8 kHz 16-bit format). The bytesToPlay parameter specifies the bytes that will be sent to the call. Internally, these bytes will be stored within a buffer. Once all bytes have played and the buffer is empty, the Played event will fire.

The lastBlock parameter indicates whether the component will expect further uses of PlayBytes. When true, this indicates that no additional bytes will be provided for this particular audio stream, and Played will fire once after the bytes have been played. Until this parameter is specified as true, the component will be considered to be playing audio.

If lastBlock is false, this indicates that the component should expect more calls to PlayBytes. Once all bytes have played and the buffer is empty, Played will fire as expected, and will continue firing until the lastBlock parameter is set to true. Within Played, the user can provide further bytes to PlayBytes. Please see below for detailed examples on how to use this method with Played.

Example: Playing audio from a stream MemoryStream playBytesStream = new MemoryStream(byteSource); phone.PlayBytes("callId", new byte[0], false); phone.OnPlayed += (o, e) => { if (e.Completed) { Console.WriteLine("Playing Bytes Completed"); } else { byte[] data = new byte[4096]; // Arbitrary length int dataLen = playBytesStream.Read(data, 0, data.Length); if (dataLen > 0) { byte[] newData = new byte[dataLen]; Array.Copy(data, newData, dataLen) // Normalize array phone.PlayBytes(e.CallId, newData, false); } else { phone.PlayBytes(e.CallId, null, true); } } }; Exmaple: Playing single audio block MemoryStream playBytesStream = new MemoryStream(byteSource); phone.PlayBytes("callId", playBytesStream.ToArray(), true); phone.OnPlayed += (o, e) => { Console.WriteLine("Done!"); // No further calls to PlayBytes are expected in this case }

PlayFile Method (IPPhone Component)

Plays audio from a WAV file to a call.

Syntax

• C#
• VB.NET

public void PlayFile(string callId, string wavFile);

Public Sub PlayFile(ByVal callId As String, ByVal wavFile As String)

Remarks

This method is used to play the audio from a WAV file to a particular call, given by callId. Audio transmission will only occur when the call has connected and CallReady has fired. Only WAV files with a sampling rate of 8 kHz and a bit depth of 16 bits per sample are supported (PCM 8 kHz 16-bit format).

Note that this component can handle playing audio to concurrent calls. This method is non-blocking and will return immediately. The Played event will fire when the audio for the specified call has finished playing. Consecutive uses of PlayText or PlayFile can prevent prior audio transmissions from being completed. In the below example, Played will only fire for the second call to PlayText:

ipphone.PlayFile("callId", "C:\\hello.wav"); // Played will not fire for this ipphone.PlayText("callId", "This will interrupt the previous use if it has not finished playing.");

The wavFile parameter specifies the path to the WAV file.

PlayText Method (IPPhone Component)

Plays audio from a string to a call using Text-to-Speech.

Syntax

• C#
• VB.NET

public void PlayText(string callId, string text);

Public Sub PlayText(ByVal callId As String, ByVal text As String)

Remarks

This method is used to play the text from a string to a particular call, given by callId, using Text-to-Speech. Audio transmission will only occur when the call has connected and CallReady has fired.

Note that this component can handle playing audio to concurrent calls. This method is non-blocking and will return immediately. The Played event will fire when the audio for the specified call has finished playing. Consecutive uses of PlayText and PlayFile can prevent prior audio transmissions from completing. In the below example, Played will only fire for the second call to PlayText:

ipphone.PlayFile("callId", "C:\\hello.wav"); // Played will not fire for this ipphone.PlayText("callId", "This will interrupt the previous use if it has not finished playing.");

The text parameter must be a string representation of the text to be transmitted.

Reset Method (IPPhone Component)

Reset the component.

Syntax

• C#
• VB.NET

public void Reset();

Public Sub Reset()

Remarks

This method will reset the component's properties to their default values.

SetMicrophone Method (IPPhone Component)

Sets the microphone used by the component.

Syntax

• C#
• VB.NET

public void SetMicrophone(string microphone);

Public Sub SetMicrophone(ByVal microphone As String)

Remarks

This method is used to set the Microphone that will be used by the component.

The microphone parameter specifies the name of the microphone to be set. To get the available microphones on the system, call ListMicrophones. Then, set the microphone with a name specified in the Microphones collection.

Example ipphone.ListMicrophones(); ipphone.SetMicrophone(ipphone.Microphones[0].Name);

SetSpeaker Method (IPPhone Component)

Sets the speaker used by the component.

Syntax

• C#
• VB.NET

public void SetSpeaker(string speaker);

Public Sub SetSpeaker(ByVal speaker As String)

Remarks

This method is used to set the speaker that will be used by the component.

The speaker parameter specifies the name of the speaker to be set. To get the available speakers on the system, call ListSpeakers. Then, set the speaker with a name specified in the Speakers collection.

Example ipphone.ListSpeakers(); ipphone.SetSpeaker(ipphone.Speakers[0].Name);

StartRecording Method (IPPhone Component)

Used to start recording the audio of a call.

Syntax

• C#
• VB.NET

public void StartRecording(string callId, string filename);

Public Sub StartRecording(ByVal callId As String, ByVal filename As String)

Remarks

This method is used to start recording the incoming and outgoing audio of a call, specified by callId. If you wish to record the audio to file, you may specify the filename parameter. Note that when this parameter is specified, you must record to a WAV file.

You may also leave the filename parameter blank if you want more direct control over the recorded data. This will cause the Record event to fire containing the call's audio data once the recording is finished.

In both scenarios, you can stop recording the call's audio via StopRecording. By default, the recording will end if the call is terminated. Note the recorded audio will have a sampling rate of 8 kHz and a bit depth of 16 bits per sample (PCM 8 kHz 16-bit format).

Example: Using the 'Record' event MemoryStream recordStream = new MemoryStream(); phone.StartRecording("callId", ""); phone.OnRecord += (o, e) => { recordStream.Write(e.RecordedDataB, 0, e.RecordedDataB.Length); File.WriteAllBytes(recordFile, recordStream.ToArray()); };

StopPlaying Method (IPPhone Component)

Stops audio from playing to a call.

Syntax

• C#
• VB.NET

public void StopPlaying(string callId);

Public Sub StopPlaying(ByVal callId As String)

Remarks

This method is used to stop the audio playing to a call, given by callId. Note that this will not stop audio from transmitting with an external device set using SetMicrophone, however, will stop audio transmitting from usage of PlayText, PlayFile, and PlayBytes.

Note that Played will not fire when this method is used.

StopRecording Method (IPPhone Component)

Stops recording the audio of a call.

Syntax

• C#
• VB.NET

public void StopRecording(string callId);

Public Sub StopRecording(ByVal callId As String)

Remarks

This method is used to stop recording the audio of a call, given by callId. The component will automatically stop recording upon call termination.

Transfer Method (IPPhone Component)

Transfers a call.

Syntax

• C#
• VB.NET

public void Transfer(string callId, string number);

Public Sub Transfer(ByVal callId As String, ByVal number As String)

Remarks

This method is used to transfer a call, specified by callId, to the phone number given by number. The component supports the following types of transfers:

Basic Transfers

Basic transfers are very simple to perform. First, the user must establish a call with the number they will be transferring (transferee). After the call is established, the user can transfer the call to the appropriate number (transfer target). The call will then be removed. For example:

string callId = ipphone1.Dial("123456789", "", true); // Establish call with transferee, hold if needed //ipphone1.Hold(callId); ipphone1.Transfer(callId, "number");

Attended Transfers

Typically, attended transfers are used to manually check if the number (or transfer target) is available for a call, provide extra information about the call, etc., before transferring. In addition to establishing a call with the transferee, the component must also establish a call with the transfer target. Once both of these calls are active, you may perform an attended transfer by calling Transfer at any moment. Afterwards, a session between these calls will be established and they will be removed. Note that Transfer must be used with the callId of the call you wish to transfer (transferee) and the number of the call you wish to transfer to (transfer target). For example:

string callId1 = ipphone1.Dial("123456789", "", true); // Establish call with Transferee, hold if needed //ipphone1.Hold(callId1); string callId2 = ipphone1.Dial("number", "", true); // Establish call with Transfer Target, hold if needed //ipphone1.Hold(callId2); ipphone1.Transfer(callId1, "number");

Note in these examples, Hold can be used to place a call on hold before a transfer. This is optional.

TypeDigit Method (IPPhone Component)

Used to type a digit.

Syntax

• C#
• VB.NET

public void TypeDigit(string callId, string digit);

Public Sub TypeDigit(ByVal callId As String, ByVal digit As String)

Remarks

This method can be used to type a digit, mimicking the functionality of a phone's keypad.

The callId parameter specifies the call that will receive the virtual keypad input.

The digit parameter specifies the digit that will be typed. Valid inputs include: 0-9, *, #

Unhold Method (IPPhone Component)

Takes a call off hold.

Syntax

• C#
• VB.NET

public void Unhold(string callId);

Public Sub Unhold(ByVal callId As String)

Remarks

This method is used to take a call, specified by callId, off hold.

Activated Event (IPPhone Component)

This event is fired immediately after the component is activated.

Syntax

• C#
• VB.NET

public event OnActivatedHandler OnActivated;

public delegate void OnActivatedHandler(object sender, IpphoneActivatedEventArgs e);

public class IpphoneActivatedEventArgs : EventArgs {
}

Public Event OnActivated As OnActivatedHandler

Public Delegate Sub OnActivatedHandler(sender As Object, e As IpphoneActivatedEventArgs)

Public Class IpphoneActivatedEventArgs Inherits EventArgs
End Class

Remarks

The Activated event will fire after the component has successfully registered with the SIP Server via Activate.

CallReady Event (IPPhone Component)

This event is fired after a call has been answered, declined, or ignored.

Syntax

• C#
• VB.NET

public event OnCallReadyHandler OnCallReady;

public delegate void OnCallReadyHandler(object sender, IpphoneCallReadyEventArgs e);

public class IpphoneCallReadyEventArgs : EventArgs {
  public string CallId { get; }
}

Public Event OnCallReady As OnCallReadyHandler

Public Delegate Sub OnCallReadyHandler(sender As Object, e As IpphoneCallReadyEventArgs)

Public Class IpphoneCallReadyEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
End Class

Remarks

For all calls, this event will fire when audio can be transmitted and received. For incoming calls, it will fire after the call has been answered.

For outgoing calls, this event will fire after the call has either been answered, declined, or ignored. In the case that the call is declined or ignored, it will fire and the component will be sent to voicemail. Hangup can be used to end the call in all scenarios.

Note that this event will fire after OutgoingCall and DialCompleted, assuming Dial was successful.

The CallId parameter is the unique Call-ID of the call.

CallStateChanged Event (IPPhone Component)

This event is fired after a call's state has changed.

Syntax

• C#
• VB.NET

public event OnCallStateChangedHandler OnCallStateChanged;

public delegate void OnCallStateChangedHandler(object sender, IpphoneCallStateChangedEventArgs e);

public class IpphoneCallStateChangedEventArgs : EventArgs {
  public string CallId { get; }
  public int State { get; }
}

Public Event OnCallStateChanged As OnCallStateChangedHandler

Public Delegate Sub OnCallStateChangedHandler(sender As Object, e As IpphoneCallStateChangedEventArgs)

Public Class IpphoneCallStateChangedEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property State As Integer
End Class

Remarks

The CallStateChanged event will fire each time the state of a call has changed.

The CallId parameter is the unique Call-ID of the call.

The State parameter denotes the state the call has changed to. The following values are applicable:

CallTerminated Event (IPPhone Component)

This event is fired after a call has been terminated.

Syntax

• C#
• VB.NET

public event OnCallTerminatedHandler OnCallTerminated;

public delegate void OnCallTerminatedHandler(object sender, IpphoneCallTerminatedEventArgs e);

public class IpphoneCallTerminatedEventArgs : EventArgs {
  public string CallId { get; }
}

Public Event OnCallTerminated As OnCallTerminatedHandler

Public Delegate Sub OnCallTerminatedHandler(sender As Object, e As IpphoneCallTerminatedEventArgs)

Public Class IpphoneCallTerminatedEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
End Class

Remarks

The CallTerminated event will fire after a call has been terminated by either end of the call.

The CallId parameter is the unique Call-ID of the call.

Deactivated Event (IPPhone Component)

This event is fired immediately after the component is deactivated.

Syntax

• C#
• VB.NET

public event OnDeactivatedHandler OnDeactivated;

public delegate void OnDeactivatedHandler(object sender, IpphoneDeactivatedEventArgs e);

public class IpphoneDeactivatedEventArgs : EventArgs {
}

Public Event OnDeactivated As OnDeactivatedHandler

Public Delegate Sub OnDeactivatedHandler(sender As Object, e As IpphoneDeactivatedEventArgs)

Public Class IpphoneDeactivatedEventArgs Inherits EventArgs
End Class

Remarks

The Deactivated event will fire after the component has unregistered from the SIP Server via Deactivate.

DialCompleted Event (IPPhone Component)

This event is fired after the dial process has finished.

Syntax

• C#
• VB.NET

public event OnDialCompletedHandler OnDialCompleted;

public delegate void OnDialCompletedHandler(object sender, IpphoneDialCompletedEventArgs e);

public class IpphoneDialCompletedEventArgs : EventArgs {
  public string OriginalCallId { get; }
  public string CallId { get; }
  public string Caller { get; }
  public string Callee { get; }
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnDialCompleted As OnDialCompletedHandler

Public Delegate Sub OnDialCompletedHandler(sender As Object, e As IpphoneDialCompletedEventArgs)

Public Class IpphoneDialCompletedEventArgs Inherits EventArgs
  Public ReadOnly Property OriginalCallId As String
  Public ReadOnly Property CallId As String
  Public ReadOnly Property Caller As String
  Public ReadOnly Property Callee As String
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

This event will fire when the dial process, initiated by calling Dial, has completed. Note that this event will not fire if an exception occurs when the "wait" parameter of Dial is true. In this case, the component will throw an exception. However, it will fire if "wait" is true and no exception occurs, indicating Dial was successful.

The OriginalCallId parameter is the value returned by Dial.

The value of the CallId parameter depends on the redirection status of the call. There are two scenarios:

1. The outgoing call has not been redirected. In this case, CallId is equal to OriginalCallId, and the value returned by Dial is correct.
2. The outgoing call has been redirected any number of times. In this case, the OriginalCallId is no longer applicable, and the CallId parameter is the new unique identifier for this call. Any reference to the past value, OriginalCallId, should be updated accordingly to reflect the change due to redirection. This would also include references to the original value returned by Dial.

Errors during the dial process are reported via the ErrorCode and Description parameters. An error code of 0 and description of "Dialed Successfully" indicate Dial has completed with no issues. A list of error codes can be found in the Error Codes section. In the case of a non-zero ErrorCode, the Description parameter will contain the error message (and SIP response code, if applicable), for example, "Dial Timeout" or "486: Busy Here".

Digit Event (IPPhone Component)

This event fires every time a digit is pressed using the keypad.

Syntax

• C#
• VB.NET

public event OnDigitHandler OnDigit;

public delegate void OnDigitHandler(object sender, IpphoneDigitEventArgs e);

public class IpphoneDigitEventArgs : EventArgs {
  public string CallId { get; }
  public string Digit { get; }
}

Public Event OnDigit As OnDigitHandler

Public Delegate Sub OnDigitHandler(sender As Object, e As IpphoneDigitEventArgs)

Public Class IpphoneDigitEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property Digit As String
End Class

Remarks

The Digit event will fire after every detected keypad input from a call.

The detected input will be present in the Digit parameter. Note, this event will not fire after the component's inputs via TypeDigit. Detectable inputs include: 0-9, *, #

The CallId parameter is the unique Call-ID of the call.

Error Event (IPPhone Component)

Information about errors during data delivery.

Syntax

• C#
• VB.NET

public event OnErrorHandler OnError;

public delegate void OnErrorHandler(object sender, IpphoneErrorEventArgs e);

public class IpphoneErrorEventArgs : EventArgs {
  public int ErrorCode { get; }
  public string Description { get; }
}

Public Event OnError As OnErrorHandler

Public Delegate Sub OnErrorHandler(sender As Object, e As IpphoneErrorEventArgs)

Public Class IpphoneErrorEventArgs Inherits EventArgs
  Public ReadOnly Property ErrorCode As Integer
  Public ReadOnly Property Description As String
End Class

Remarks

The Error event is fired in case of exceptional conditions during message processing. Normally the component throws an exception.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

IncomingCall Event (IPPhone Component)

This event is fired when there's an incoming call.

Syntax

• C#
• VB.NET

public event OnIncomingCallHandler OnIncomingCall;

public delegate void OnIncomingCallHandler(object sender, IpphoneIncomingCallEventArgs e);

public class IpphoneIncomingCallEventArgs : EventArgs {
  public string CallId { get; }
  public string RemoteUser { get; }
}

Public Event OnIncomingCall As OnIncomingCallHandler

Public Delegate Sub OnIncomingCallHandler(sender As Object, e As IpphoneIncomingCallEventArgs)

Public Class IpphoneIncomingCallEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property RemoteUser As String
End Class

Remarks

The IncomingCall event will fire after an incoming call is detected.

The CallId parameter specifies the unique Call-ID of the call, and can be used to Answer or Decline the call.

The RemoteUser parameter indicates the username or telephone number of the remote user associated with the call.

Log Event (IPPhone Component)

This event is fired once for each log message.

Syntax

• C#
• VB.NET

public event OnLogHandler OnLog;

public delegate void OnLogHandler(object sender, IpphoneLogEventArgs e);

public class IpphoneLogEventArgs : EventArgs {
  public int LogLevel { get; }
  public string Message { get; }
  public string LogType { get; }
}

Public Event OnLog As OnLogHandler

Public Delegate Sub OnLogHandler(sender As Object, e As IpphoneLogEventArgs)

Public Class IpphoneLogEventArgs Inherits EventArgs
  Public ReadOnly Property LogLevel As Integer
  Public ReadOnly Property Message As String
  Public ReadOnly Property LogType As String
End Class

Remarks

This event fires once for each log message generated by the component. The verbosity is controlled by the LogLevel configuration.

LogLevel indicates the detail level of the message. Possible values are:

Message is the log message.

LogType identifies the type of log entry. Possible values are as follows:

• Info
• Packet
• RTP

OutgoingCall Event (IPPhone Component)

This event is fired when an outgoing call has been made.

Syntax

• C#
• VB.NET

public event OnOutgoingCallHandler OnOutgoingCall;

public delegate void OnOutgoingCallHandler(object sender, IpphoneOutgoingCallEventArgs e);

public class IpphoneOutgoingCallEventArgs : EventArgs {
  public string CallId { get; }
  public string RemoteUser { get; }
}

Public Event OnOutgoingCall As OnOutgoingCallHandler

Public Delegate Sub OnOutgoingCallHandler(sender As Object, e As IpphoneOutgoingCallEventArgs)

Public Class IpphoneOutgoingCallEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property RemoteUser As String
End Class

Remarks

The OutgoingCall event is fired when an outgoing call has been made using Dial. This event signifies the start of the invite process.

The CallId parameter is the unique Call-ID of the call.

The RemoteUser parameter indicates the username or telephone number of the remote user associated with the call.

Played Event (IPPhone Component)

This event is fired after the component finishes playing available audio.

Syntax

• C#
• VB.NET

public event OnPlayedHandler OnPlayed;

public delegate void OnPlayedHandler(object sender, IpphonePlayedEventArgs e);

public class IpphonePlayedEventArgs : EventArgs {
  public string CallId { get; }
  public bool Completed { get; }
}

Public Event OnPlayed As OnPlayedHandler

Public Delegate Sub OnPlayedHandler(sender As Object, e As IpphonePlayedEventArgs)

Public Class IpphonePlayedEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property Completed As Boolean
End Class

Remarks

The Played event will fire after the component finishes playing available audio to a call. When using PlayText or PlayFile, Completed will always be true. However, this will not always be the case when using PlayBytes.

When playing audio via PlayBytes, this event will fire when the internal byte queue is empty. In the event that the internal byte queue is empty, and the component is still expecting calls to PlayBytes (i.e., lastBlock is false), this event will continue to fire with the Completed parameter as false. In this case, additional bytes are expected to be provided. Completed will be true once all bytes have been played and the component is no longer expecting calls to PlayBytes (i.e., lastBlock is true). Please see the method description for more details.

The CallId parameter is the unique Call-ID of the call.

Record Event (IPPhone Component)

This event is fired when recorded audio data is available.

Syntax

• C#
• VB.NET

public event OnRecordHandler OnRecord;

public delegate void OnRecordHandler(object sender, IpphoneRecordEventArgs e);

public class IpphoneRecordEventArgs : EventArgs {
  public string CallId { get; }
  public string RecordedData { get; }
  public byte[] RecordedDataB { get; }
}

Public Event OnRecord As OnRecordHandler

Public Delegate Sub OnRecordHandler(sender As Object, e As IpphoneRecordEventArgs)

Public Class IpphoneRecordEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
  Public ReadOnly Property RecordedData As String
  Public ReadOnly Property RecordedDataB As Byte()
End Class

Remarks

This event is fired when a call's recorded data is available. This data is made available when either StopRecording is called or the call is terminated. Note that for this event to fire, StartRecording must be specified with no filename parameter.

The recorded data will be available in the RecordedData and RecordedDataB parameters, and will have a sampling rate of 8 kHz and a bit depth of 16 bits per sample (PCM 8 kHz 16-bit format).

The CallId parameter is the unique Call-ID of the call.

Silence Event (IPPhone Component)

This event is fired when the component detects silence from incoming audio streams.

Syntax

• C#
• VB.NET

public event OnSilenceHandler OnSilence;

public delegate void OnSilenceHandler(object sender, IpphoneSilenceEventArgs e);

public class IpphoneSilenceEventArgs : EventArgs {
  public string CallId { get; }
}

Public Event OnSilence As OnSilenceHandler

Public Delegate Sub OnSilenceHandler(sender As Object, e As IpphoneSilenceEventArgs)

Public Class IpphoneSilenceEventArgs Inherits EventArgs
  Public ReadOnly Property CallId As String
End Class

Remarks

The Silence event will fire every second the component detects silence from a call's incoming audio stream. Note that this event can fire while an outgoing call is ringing.

The CallId parameter is the unique Call-ID of the call.

SSLServerAuthentication Event (IPPhone Component)

Fired after the server presents its certificate to the client.

Syntax

• C#
• VB.NET

public event OnSSLServerAuthenticationHandler OnSSLServerAuthentication;

public delegate void OnSSLServerAuthenticationHandler(object sender, IpphoneSSLServerAuthenticationEventArgs e);

public class IpphoneSSLServerAuthenticationEventArgs : EventArgs {
  public string CertEncoded { get; }
  public byte[] CertEncodedB { get; }
  public string CertSubject { get; }
  public string CertIssuer { get; }
  public string Status { get; }
  public bool Accept { get; set; }
}

Public Event OnSSLServerAuthentication As OnSSLServerAuthenticationHandler

Public Delegate Sub OnSSLServerAuthenticationHandler(sender As Object, e As IpphoneSSLServerAuthenticationEventArgs)

Public Class IpphoneSSLServerAuthenticationEventArgs Inherits EventArgs
  Public ReadOnly Property CertEncoded As String
  Public ReadOnly Property CertEncodedB As Byte()
  Public ReadOnly Property CertSubject As String
  Public ReadOnly Property CertIssuer As String
  Public ReadOnly Property Status As String
  Public Property Accept As Boolean
End Class

Remarks

This event is where the client can decide whether to continue with the connection process or not. The Accept parameter is a recommendation on whether to continue or close the connection. This is just a suggestion: application software must use its own logic to determine whether to continue or not.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK"). If it is decided to continue, you can override and accept the certificate by setting the Accept parameter to True.

SSLStatus Event (IPPhone Component)

Shows the progress of the secure connection.

Syntax

• C#
• VB.NET

public event OnSSLStatusHandler OnSSLStatus;

public delegate void OnSSLStatusHandler(object sender, IpphoneSSLStatusEventArgs e);

public class IpphoneSSLStatusEventArgs : EventArgs {
  public string Message { get; }
}

Public Event OnSSLStatus As OnSSLStatusHandler

Public Delegate Sub OnSSLStatusHandler(sender As Object, e As IpphoneSSLStatusEventArgs)

Public Class IpphoneSSLStatusEventArgs Inherits EventArgs
  Public ReadOnly Property Message As String
End Class

Remarks

The event is fired for informational and logging purposes only. Used to track the progress of the connection.

Call Type

Contains the details of an active call.

Remarks

This type contains the details of an active call.

Fields

Constructors

• C#
• VB.NET

public Call();

Public Call()

Certificate Type

This is the digital certificate being used.

Remarks

This type describes the current digital certificate. The certificate may be a public or private key. The fields are used to identify or select certificates.

Fields

Constructors

• C#
• VB.NET

public Certificate();

Public Certificate()

Creates a Certificate instance whose properties can be set. This is useful for use with CERTMGR when generating new certificates.

• C#
• VB.NET

public Certificate(string certificateFile);

Public Certificate(ByVal CertificateFile As String)

Opens CertificateFile and reads out the contents as an X509 public key.

• C#
• VB.NET

public Certificate(byte[] certificateData);

Public Certificate(ByVal CertificateData As Byte())

Parses CertificateData as an X509 public key.

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, string store, string storePassword, string subject);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String)

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, string store, string storePassword, string subject, string configurationString);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. ConfigurationString is a newline separated list of name-value pairs that may be used to modify the default behavior. Possible values include "PersistPFXKey", which shows whether or not the PFX key is persisted after performing operations with the private key. This correlates to the PKCS12_NO_PERSIST_KEY CyrptoAPI option. The default value is True (the key is persisted). "Thumbprint" - a MD5, SHA1, or SHA256 thumbprint of the certificate to load. When specified, this value is used to select the certificate in the store. This is applicable to cstUser, cstMachine, cstPublicKeyFile, and cstPFXFile store types. "UseInternalSecurityAPI" shows whether the platform (default) or the internal security API is used when performing certificate-related operations. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, string store, string storePassword, byte[] encoded);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal Store As String, ByVal StorePassword As String, ByVal Encoded As Byte())

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a file containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, byte[] storeBlob, string storePassword, string subject);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal StoreBlob As Byte(), ByVal StorePassword As String, ByVal Subject As String)

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, byte[] storeBlob, string storePassword, string subject, string configurationString);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal StoreBlob As Byte(), ByVal StorePassword As String, ByVal Subject As String, ByVal ConfigurationString As String)

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. StoreBlob is a string (binary- or base64-encoded) containing the certificate data. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will attempt to find the certificate identified by Subject . This can be either a complete or a substring match of the X509 certificate's subject Distinguished Name (DN).

• C#
• VB.NET

public Certificate(CertStoreTypes certStoreType, byte[] storeBlob, string storePassword, byte[] encoded);

Public Certificate(ByVal CertStoreType As CertStoreTypes, ByVal StoreBlob As Byte(), ByVal StorePassword As String, ByVal Encoded As Byte())

CertStoreType identifies the type of certificate store to use. See StoreType for descriptions of the different certificate stores. Store is a string (binary- or base64-encoded) containing the certificate store. StorePassword is the password used to protect the store. After the store has been successfully opened, the component will load Encoded as an X509 certificate and search the opened store for a corresponding private key.

Microphone Type

This is a microphone detected on the system.

Remarks

This type describes a microphone that has been detected on the system.

Fields

Constructors

• C#
• VB.NET

public Microphone();

Public Microphone()

Speaker Type

This is a speaker detected on the system.

Remarks

This type describes a speaker that has been detected on the system

Fields

Constructors

• C#
• VB.NET

public Speaker();

Public Speaker()

Config Settings (IPPhone Component)

IPPhone Config Settings

Base Config Settings

Trappable Errors (IPPhone Component)

IPPHONE Errors

UDP Errors

SSL Errors

TCP/IP Errors