LINECALLINFO

The LINECALLINFO structure contains information about a call. This information remains relatively fixed for the duration of the call and is obtained with lineGetCallInfo. If a part of the structure does change, then a LINE_CALLINFO message is sent to the application indicating which information item has changed. Dynamically changing information about a call, such as call progress status, is available in the LINECALLSTATUS structure, returned with the function lineGetCallStatus.

typedef struct linecallinfo_tag {

DWORD dwTotalSize;

DWORD dwNeededSize;

DWORD dwUsedSize;

HLINE hLine;

DWORD dwLineDeviceID;

DWORD dwAddressID;

DWORD dwBearerMode;

DWORD dwRate;

DWORD dwMediaMode;

DWORD dwAppSpecific;

DWORD dwCallID;

DWORD dwRelatedCallID;

DWORD dwCallParamFlags;

DWORD dwCallStates;

DWORD dwMonitorDigitModes;

DWORD dwMonitorMediaModes;

LINEDIALPARAMS DialParams;

DWORD dwOrigin;

DWORD dwReason;

DWORD dwCompletionID;

DWORD dwNumOwners;

DWORD dwNumMonitors;

DWORD dwCountryCode;

DWORD dwTrunk;

DWORD dwCallerIDFlags;

DWORD dwCallerIDSize;

DWORD dwCallerIDOffset;

DWORD dwCallerIDNameSize;

DWORD dwCallerIDNameOffset;

DWORD dwCalledIDFlags;

DWORD dwCalledIDSize;

DWORD dwCalledIDOffset;

DWORD dwCalledIDNameSize;

DWORD dwCalledIDNameOffset;

DWORD dwConnectedIDFlags;

DWORD dwConnectedIDSize;

DWORD dwConnectedIDOffset;

DWORD dwConnectedIDNameSize;

DWORD dwConnectedIDNameOffset;

DWORD dwRedirectionIDFlags;

DWORD dwRedirectionIDSize;

DWORD dwRedirectionIDOffset;

DWORD dwRedirectionIDNameSize;

DWORD dwRedirectionIDNameOffset;

DWORD dwRedirectingIDFlags;

DWORD dwRedirectingIDSize;

DWORD dwRedirectingIDOffset;

DWORD dwRedirectingIDNameSize;

DWORD dwRedirectingIDNameOffset;

DWORD dwAppNameSize;

DWORD dwAppNameOffset;

DWORD dwDisplayableAddressSize;

DWORD dwDisplayableAddressOffset;

DWORD dwCalledPartySize;

DWORD dwCalledPartyOffset;

DWORD dwCommentSize;

DWORD dwCommentOffset;

DWORD dwDisplaySize;

DWORD dwDisplayOffset;

DWORD dwUserUserInfoSize;

DWORD dwUserUserInfoOffset;

DWORD dwHighLevelCompSize;

DWORD dwHighLevelCompOffset;

DWORD dwLowLevelCompSize;

DWORD dwLowLevelCompOffset;

DWORD dwChargingInfoSize;

DWORD dwChargingInfoOffset;

DWORD dwTerminalModesSize;

DWORD dwTerminalModesOffset;

DWORD dwDevSpecificSize;

DWORD dwDevSpecificOffset;

DWORD dwCallTreatment;

DWORD dwCallDataSize;

DWORD dwCallDataOffset;

DWORD dwSendingFlowspecSize;

DWORD dwSendingFlowspecOffset;

DWORD dwReceivingFlowspecSize;

DWORD dwReceivingFlowspecOffset;

} LINECALLINFO, FAR *LPLINECALLINFO;

Members
dwTotalSize

The total size in bytes allocated to this data structure.

dwNeededSize

The size in bytes for this data structure that is needed to hold all the returned information.

dwUsedSize

The size in bytes of the portion of this data structure that contains useful information.

hLine

The handle for the line device with which this call is associated.

dwLineDeviceID

The device ID of the line device with which this call is associated.

dwAddressID

The address ID of the address on the line on which this call exists.

dwBearerMode

The current bearer mode of the call. This field uses the following LINEBEARERMODE_ constants:

LINEBEARERMODE_VOICE

This is a regular 3.1 kHz analog voice grade bearer service. Bit integrity is not assured. Voice can support fax and modem media modes.

LINEBEARERMODE_SPEECH

This corresponds to G.711 speech transmission on the call. The network may use processing techniques such as analog transmission, echo cancellation, and compression/decompression. Bit integrity is not assured. Speech is not intended to support fax and modem media modes.

LINEBEARERMODE_MULTIUSE

The multiuse mode defined by ISDN.

LINEBEARERMODE_DATA

The unrestricted data transfer on the call. The data rate is specified separately.

LINEBEARERMODE_ALTSPEECHDATA

The alternate transfer of speech or unrestricted data on the same call (ISDN).

LINEBEARERMODE_NONCALLSIGNALING

A non-call-associated signaling connection from the application to the service provider or switch (treated as a "media stream" by TAPI).

LINEBEARERMODE_PASSTHROUGH

When a call is active in LINEBEARERMODE_PASSTHROUGH, the service provider gives direct access to the attached hardware for control by the application. This mode is used primarily by applications desiring temporary direct control over asynchronous modems, accessed through the Win32 comm functions, for the purpose of configuring or using special features not otherwise supported by the service provider.

dwRate

The rate of the call's data stream in bps (bits per second).

dwMediaMode

Specifies the media mode of the information stream currently on the call. This is the media mode as determined by the owner of the call, which is not necessarily the same as that of the last LINE_MONITORMEDIA message. This field is not directly affected by the LINE_MONITORMEDIA messages. It uses the following LINEMEDIAMODE_ constants:

LINEMEDIAMODE_UNKNOWN

A media stream exists but its mode is not known. This corresponds to a call with an unclassified media type. In typical analog telephony environments, an inbound call's media mode may be unknown until after the call has been answered and the media stream has been filtered to make a determination.

LINEMEDIAMODE_INTERACTIVEVOICE

The presence of voice energy is detected on the call and the call is treated as an interactive call with humans on both ends.

LINEMEDIAMODE_AUTOMATEDVOICE

The presence of voice energy is detected on the call and the voice is locally handled by an automated application.

LINEMEDIAMODE_DATAMODEM

A data modem session is detected on the call.

LINEMEDIAMODE_G3FAX

A group 3 fax is being sent or received on the call.

LINEMEDIAMODE_G4FAX

A group 4 fax is being sent or received over the call.

LINEMEDIAMODE_TDD

A TDD (Telephony Devices for the Deaf) session on the call.

LINEMEDIAMODE_DIGITALDATA

Digital data being sent or received over the call.

LINEMEDIAMODE_TELETEX

A teletex session on the call. Teletex is one of the telematic services.

LINEMEDIAMODE_VIDEOTEX

A videotex session on the call. Videotex is one the telematic services.

LINEMEDIAMODE_TELEX

A telex session on the call. Telex is one the telematic services.

LINEMEDIAMODE_MIXED

A mixed session on the call. Mixed is one the ISDN telematic services.

LINEMEDIAMODE_ADSI

An ADSI (Analog Display Services Interface) session on the call.

LINEMEDIAMODE_VOICEVIEW

The media mode of the call is VoiceView.

dwAppSpecific

This field is uninterpreted by the API implementation and service provider. It can be set by any owner application of this call with the operation lineSetAppSpecific.

dwCallID

In some telephony environments, the switch or service provider may assign a unique identifier to each call. This allows the call to be tracked across transfers, forwards, or other events. The domain of these call IDs and their scope is service-provider defined. The dwCallID field makes this unique identifier available to the applications.

dwRelatedCallID

Telephony environments that use the call ID often may find it necessary to relate one call to another. The dwRelatedCallID field may be used by the service provider for this purpose.

dwCallParamFlags

A collection of call-related parameters when the call is outbound. These are same call parameters specified in lineMakeCall, of type LINECALLPARAMFLAGS_. Values are:

LINECALLPARAMFLAGS_SECURE

The call is currently secure. This flag is also updated if the call is later secured through lineSecureCall.

LINECALLPARAMFLAGS_IDLE

The call started out using an idle call.

LINECALLPARAMFLAGS_BLOCKID

The originator identity was concealed (block caller ID presentation to the remote party).

LINECALLPARAMFLAGS_ORIGOFFHOOK

The originator's phone was automatically taken offhook.

LINECALLPARAMFLAGS_DESTOFFHOOK

The called party's phone was automatically taken offhook.

dwCallStates

The call states for which the application may be notified on this call, of type LINECALLSTATE_. The dwCallStates member is constant in LINECALLINFO and does not change depending on the call state. Values are:

LINECALLSTATE_IDLE

The call is idle

no call exists.

LINECALLSTATE_OFFERING

The call is being offered to the station signaling the arrival of a new call. In some environments, a call in the offering state does not automatically alert the user; alerting is done by the switch instructing the line to ring. It does not affect any call states.

LINECALLSTATE_ACCEPTED

The call was offering and has been accepted. This indicates to other (monitoring) applications that the current owner application has claimed responsibility for answering the call. In ISDN, this also initiates alerting to both parties.

LINECALLSTATE_DIALTONE

The call is receiving a dial tone from the switch, which means that the switch is ready to receive a dialed number.

LINECALLSTATE_DIALING

Destination address information (a phone number) is being sent to the switch over the call. Note that the operation lineGenerateDigits does not place the line into the dialing state.

LINECALLSTATE_RINGBACK

The call is receiving ringback from the called address. Ringback indicates that the other station has been reached and is being alerted.

LINECALLSTATE_BUSY

The call is receiving a busy tone. Busy tone indicates that the call cannot be completed

either a circuit (trunk) or the remote party's station are in use.

LINECALLSTATE_SPECIALINFO

Special information is sent by the network. Special information is typically sent when the destination cannot be reached.

LINECALLSTATE_CONNECTED

The call has been established, the connection is made. Information is able to flow over the call between the originating address and the destination address.

LINECALLSTATE_PROCEEDING

Dialing has completed and the call is proceeding through the switch or telephone network.

LINECALLSTATE_ONHOLD

The call is on hold by the switch.

LINECALLSTATE_CONFERENCED

The call is currently a member of a multiparty conference call.

LINECALLSTATE_ONHOLDPENDCONF

The call is currently on hold while it is being added to a conference.

LINECALLSTATE_ONHOLDPENDTRANSF

The call is currently on hold awaiting transfer to another number.

LINECALLSTATE_DISCONNECTED

The remote party has disconnected from the call.

LINECALLSTATE_UNKNOWN

The state of the call is not known. This may be due to limitations of the call progress detection implementation.

dwMonitorDigitsModes

The various digit modes for which monitoring is currently enabled, of type LINEDIGITMODE_. Values are:

LINEDIGITMODE_PULSE

Uses pulse/rotary for digit signaling.

LINEDIGITMODE_DTMF

Uses DTMF tones for digit signaling.

LINEDIGITMODE_DTMFEND

Uses DTMF tones for digit detection, and also detects the down edges.

dwMonitorMediaModes

The various media modes for which monitoring is currently enabled, of type LINEMEDIAMODE_. Values are:

LINEMEDIAMODE_INTERACTIVEVOICE

The presence of voice energy on the call and the call is treated as an interactive call with humans on both ends.

LINEMEDIAMODE_AUTOMATEDVOICE

The presence of voice energy on the call and the voice is locally handled by an automated application.

LINEMEDIAMODE_DATAMODEM

A data modem session on the call.

LINEMEDIAMODE_G3FAX

A group 3 fax is being sent or received over the call.

LINEMEDIAMODE_G4FAX

A group 4 fax is being sent or received over the call.

LINEMEDIAMODE_TDD

A TDD (Telephony Devices for the Deaf) session on the call.

LINEMEDIAMODE_DIGITALDATA

Digital data is being sent or received over the call.

LINEMEDIAMODE_TELETEX

A teletex session on the call. Teletex is one of the telematic services.

LINEMEDIAMODE_VIDEOTEX

A videotex session on the call. Videotex is one the telematic services.

LINEMEDIAMODE_TELEX

A telex session on the call. Telex is one the telematic services.

LINEMEDIAMODE_MIXED

A mixed session on the call. Mixed is one the ISDN telematic services.

LINEMEDIAMODE_ADSI

An ADSI (Analog Display Services Interface) session on the call.

LINEMEDIAMODE_VOICEVIEW

The media mode of the call is VoiceView.

DialParams

The dialing parameters currently in effect on the call, of type LINEDIALPARAMS. Unless these parameters are set by either lineMakeCall or lineSetCallParams, their values will be the same as the defaults used in the LINEDEVCAPS.

dwOrigin

Identifies where the call originated from. This field uses the following LINECALLORIGIN_ constants:

LINECALLORIGIN_OUTBOUND

The call is an outbound call.

LINECALLORIGIN_INTERNAL

The call is inbound and originated internally (on the same PBX, for example).

LINECALLORIGIN_EXTERNAL

The call is inbound and originated externally.

LINECALLORIGIN_UNKNOWN

The call is an inbound call and its origin is currently unknown but may become known later.

LINECALLORIGIN_UNAVAIL

The call is an inbound call. Its origin is not available and will never become known for this call.

LINECALLORIGIN_CONFERENCE

The call handle is for a conference call, that is, the application's connection to the conference bridge in the switch.

dwReason

The reason why the call occurred. This field uses the following LINECALLREASON_ constants:

LINECALLREASON_DIRECT

This is a direct call.

LINECALLREASON_FWDBUSY

This call was forwarded from another extension that was busy at the time of the call.

LINECALLREASON_FWDNOANSWER

The call was forwarded from another extension that didn't answer the call after some number of rings.

LINECALLREASON_FWDUNCOND

The call was forwarded unconditionally from another number.

LINECALLREASON_PICKUP

The call was picked up from another extension.

LINECALLREASON_UNPARK

The call was retrieved as a parked call.

LINECALLREASON_REDIRECT

The call was redirected to this station.

LINECALLREASON_CALLCOMPLETION

The call was the result of a call completion request.

LINECALLREASON_TRANSFER

The call has been transferred from another number. Party ID information may indicate who the caller is and where the call was transferred from.

LINECALLREASON_REMINDER

The call is a reminder (or "recall") that the user has a call parked or on hold for potentially a long time.

LINECALLREASON_UNKNOWN

The reason for the call is currently unknown but may become known later.

LINECALLREASON_UNAVAIL

The reason for the call is unavailable and will not become known later.

dwCompletionID

The completion ID for the incoming call if it is the result of a completion request that terminates. This ID is meaningful only if dwReason is LINECALLREASON_CALLCOMPLETION.

dwNumOwners

The number of application modules with different call handles with owner privilege for the call.

dwNumMonitors

The number of application modules with different call handles with monitor privilege for the call.

dwCountryCode

The country code of the destination party. Zero if unknown.

dwTrunk

The number of the trunk over which the call is routed. This field is used for both inbound and outgoing calls. The dwTrunk field should be set to 0xFFFFFFFF if it is unknown.

dwCallerIDFlags

Determines the validity and content of the caller party ID information. The caller is the originator of the call. This field uses the following LINECALLPARTYID_ constants:

LINECALLPARTYID_BLOCKED

Caller ID information for the call has been blocked by the caller but would otherwise have been available.

LINECALLPARTYID_OUTOFAREA

Caller ID information for the call is not available because it is not propagated all the way by the network.

LINECALLPARTYID_NAME

The caller ID information for the call is the caller's name (from a table maintained inside the switch). It is provided in the caller ID name variably sized field.

LINECALLPARTYID_ADDRESS

The caller ID information for the call is the caller's number and is provided in the caller ID variably sized field.

LINECALLPARTYID_PARTIAL

Caller ID information for the call is valid but is limited to partial number information.

LINECALLPARTYID_UNKNOWN

Caller ID information is currently unknown but it may become known later.

LINECALLPARTYID_UNAVAIL

Caller ID information is unavailable and will not become known later.

dwCallerIDSize

dwCallerIDOffset

The size in bytes of the variably sized field containing the caller party ID number information, and the offset in bytes from the beginning of this data structure.

dwCallerIDNameSize

dwCallerIDNameOffset

The size in bytes of the variably sized field containing the caller party ID name information, and the offset in bytes from the beginning of this data structure.

dwCalledIDFlags

Determines the validity and content of the called-party ID information. The called party corresponds to the originally addressed party. This field uses the following LINECALLPARTYID_ constants:

LINECALLPARTYID_BLOCKED

Called ID information for the call has been blocked by the caller but would otherwise have been available.

LINECALLPARTYID_OUTOFAREA

Caller ID information for the call is not available because it is not propagated all the way by the network.

LINECALLPARTYID_NAME

The called ID information for the call is the caller's name (from a table maintained inside the switch). It is provided in the called ID name variably sized field.

LINECALLPARTYID_ADDRESS

The called ID information for the call is the caller's number and is provided in the called ID variably sized field.

LINECALLPARTYID_PARTIAL

Called ID information for the call is valid but is limited to partial number information.

LINECALLPARTYID_UNKNOWN

Called ID information is currently unknown but it may become known later.

LINECALLPARTYID_UNAVAIL

Called ID information is unavailable and will not become known later.

dwCalledIDSize

dwCalledIDOffset

The size in bytes of the variably sized field containing the called-party ID number information, and the offset in bytes from the beginning of this data structure.

dwCalledIDNameSize

dwCalledIDNameOffset

The size in bytes of the variably sized field containing the called-party ID name information, and the offset in bytes from the beginning of this data structure.

dwConnectedFlags

Determines the validity and content of the connected party ID information. The connected party is the party that was actually connected to. This may be different from the called-party ID if the call was diverted. This field uses the following LINECALLPARTYID_ constants:

LINECALLPARTYID_BLOCKED

Connected party ID information for the call has been blocked by the caller but would otherwise have been available.

LINECALLPARTYID_OUTOFAREA

Connected ID information for the call is not available as it is not propagated all the way by the network.

LINECALLPARTYID_NAME

The connected party ID information for the call is the caller's name (from a table maintained inside the switch). It is provided in the connected ID name variably sized field.

LINECALLPARTYID_ADDRESS

The connected party ID information for the call is the caller's number and is provided in the connected ID variably sized field.

LINECALLPARTYID_PARTIAL

Connected party ID information for the call is valid but is limited to partial number information.

LINECALLPARTYID_UNKNOWN

Connected party ID information is currently unknown but it may become known later.

LINECALLPARTYID_UNAVAIL

Connected party ID information is unavailable and will not become known later.

dwConnectedIDSize

dwConnectedIDOffset

The size in bytes of the variably sized field containing the connected party ID number information, and the offset in bytes from the beginning of this data structure.

dwConnectedIDNameSize

dwConnectedIDNameOffset

The size in bytes of the variably sized field containing the connected party ID name information, and the offset in bytes from the beginning of this data structure.

dwRedirectionIDFlags

Determines the validity and content of the redirection party ID information. The redirection party identifies to the calling user the number towards which diversion was invoked. This field uses the following LINECALLPARTYID_ constants:

LINECALLPARTYID_BLOCKED

Redirection party ID information for the call has been blocked by the caller but would otherwise have been available.

LINECALLPARTYID_OUTOFAREA

Redirection ID information for the call is not available because it is not propagated all the way by the network.

LINECALLPARTYID_NAME

The redirection party ID information for the call is the caller's name (from a table maintained inside the switch). It is provided in the redirection ID name variably sized field.

LINECALLPARTYID_ADDRESS

The redirection party ID information for the call is the caller's number and is provided in the redirection ID variably sized field.

LINECALLPARTYID_PARTIAL

Redirection party ID information for the call is valid but is limited to partial number information.

LINECALLPARTYID_UNKNOWN

Redirection ID information is currently unknown but it may become known later.

LINECALLPARTYID_UNAVAIL

Redirection ID information is unavailable and will not become known later.

dwRedirectionIDSize

dwRedirectionIDOffset

The size in bytes of the variably sized field containing the redirection party ID number information, and the offset in bytes from the beginning of this data structure.

dwRedirectionIDNameSize

dwRedirectionIDNameOffset

The size in bytes of the variably sized field containing the redirection party ID name information, and the offset in bytes from the beginning of this data structure.

dwRedirectingIDFlags

Determines the validity and content of the redirecting party ID information. The redirecting party identifies to the diverted-to user the party from which diversion was invoked. This field uses the following LINECALLPARTYID_ constants:

LINECALLPARTYID_BLOCKED

Redirecting party ID information for the call has been blocked by the caller but would otherwise have been available.

LINECALLPARTYID_OUTOFAREA

Redirecting ID information for the call is not available because it is not propagated all the way by the network.

LINECALLPARTYID_NAME

The redirecting party ID information for the call is the caller's name (from a table maintained inside the switch). It is provided in the redirecting ID name variably sized field.

LINECALLPARTYID_ADDRESS

The redirecting party ID information for the call is the caller's number and is provided in the redirecting ID variably sized field.

LINECALLPARTYID_PARTIAL

Redirecting party ID information for the call is valid but is limited to partial number information.

LINECALLPARTYID_UNKNOWN

Redirecting ID information is currently unknown but it may become known later.

LINECALLPARTYID_UNAVAIL

Redirecting ID information is unavailable and will not become known later.

dwRedirectingIDSize

dwRedirectingIDOffset

The size in bytes of the variably sized field containing the redirecting party ID number information, and the offset in bytes from the beginning of this data structure.

dwRedirectingIDNameSize

dwRedirectingIDNameOffset

The size in bytes of the variably sized field containing the redirecting party ID name information, and the offset in bytes from the beginning of this data structure.

dwAppNameSize

dwAppNameOffset

The size in bytes and the offset in bytes from the beginning of this data structure of the variably sized field holding the user-friendly application name of the application that first originated, accepted, or answered the call. This is the name that an application can specify in lineInitializeEx. If the application specifies no such name, then the application's module file name is used instead.

dwDisplayableAddressSize

dwDisplayableAddressOffset

The displayable string is used for logging purposes. The information is obtained from LINECALLPARAMS for functions that initiate calls. The function lineTranslateAddress returns appropriate information to be placed in this field in the dwDisplayableAddressSize and dwDisplayableAddressOffset fields of the LINETRANSLATEOUTPUT structure.

dwCalledPartySize

dwCalledPartyOffset

The size in bytes of the variably sized field holding a user-friendly description of the called party, and the offset in bytes from the beginning of this data structure. This information can be specified on lineMakeCall and can be optionally specified in the lpCallParams whenever a new call is established. It is useful for call logging purposes.

dwCommentSize

dwCommentOffset

The size in bytes of the variably sized field holding a comment about the call provided by the application that originated the call using lineMakeCall, and the offset in bytes from the beginning of this data structure. This information can be optionally specified in the lpCallParams whenever a new call is established.

dwDisplaySize

dwDisplayOffset

The size in bytes of the variably sized field holding raw display information, and the offset in bytes from the beginning of this data structure. Depending on the telephony environment, a service provider may extract functional information from this for presentation in a more functional way.

dwUserUserInfoSize

dwUserUserInfoOffset

The size in bytes of the variably sized field holding user-to-user information, and the offset in bytes from the beginning of this data structure The protocol discriminator field for the user-to-user information, if used, appears as the first byte of the data pointed to by dwUserUserInfoOffset, and is accounted for in dwUserUserInfoSize.

dwHighLevelCompSize

dwHighLevelCompOffset

The size in bytes of the variably sized field holding high-level compatibility information, and the offset in bytes from the beginning of this data structure. The format of this information is specified by other standards (ISDN Q.931).

dwLowLevelCompSize

dwLowLevelCompOffset

The size in bytes of the variably sized field holding low-level compatibility information, and the offset in bytes from the beginning of this data structure The format of this information is specified by other standards (ISDN Q.931).

dwChargingInfoSize

dwChargingInfoOffset

The size in bytes of the variably sized field holding charging information, and the offset in bytes from the beginning of this data structure The format of this information is specified by other standards (ISDN Q.931).

dwTerminalModesSize

dwTerminalModesOffset

The size in bytes of the variably sized device field containing an array with DWORD-sized entries, and the offset in bytes from the beginning of this data structure. The set of LINETERMMODE_ constants is indexed by terminal IDs, in the range from zero to one less than dwNumTerminals. Each entry in the array specifies the current terminal modes for the corresponding terminal set with the lineSetTerminal operation for this call's media stream. Values are:

LINETERMMODE_LAMPS

Lamp events sent from the line to the terminal.

LINETERMMODE_BUTTONS

Button-press events sent from the terminal to the line.

LINETERMMODE_DISPLAY

Display information sent from the line to the terminal.

LINETERMMODE_RINGER

Ringer-control information sent from the switch to the terminal.

LINETERMMODE_HOOKSWITCH

Hookswitch event sent between the terminal and the line.

LINETERMMODE_MEDIATOLINE

The unidirectional media stream from the terminal to the line associated with a call on the line. Use this value when the routing of both unidirectional channels of a call's media stream can be controlled independently.

LINETERMMODE_MEDIAFROMLINE

The unidirectional media stream from the line to the terminal associated with a call on the line. Use this value when the routing of both unidirectional channels of a call's media stream can be controlled independently.

LINETERMMODE_MEDIABIDIRECT

The bidirectional media stream associated with a call on the line and the terminal. Use this value when the routing of both the unidirectional channels of a call's media stream cannot be controlled independently.

dwDevSpecificSize

dwDevSpecificOffset

The size in bytes of the variably sized field holding device-specific information., and the offset in bytes from the beginning of this data structure.

dwCallTreatment

The call treatment currently being applied on the call or that will be applied when the call enters the next applicable state. May be 0 if call treatments are not supported.

dwCallDataSize

dwCallDataOffset

The size in bytes and offset from the beginning of LINECALLINFO of the application-settable call data.

dwSendingFlowspecSize

dwSendingFlowspecOffset

The total size in bytes and offset from the beginning of LINECALLINFO of a WinSock2 FLOWSPEC structure followed by WinSock2 provider-specific data, equivalent to what would have been stored in SendingFlowspec.len in a WinSock2 QOS structure. Specifies the quality of service current in effect in the sending direction on the call. The provider-specific portion following the FLOWSPEC structure must not contain pointers to other blocks of memory, because TAPI will not know how to marshal the data pointed to by the private pointer(s) and convey it through interprocess communication to the application.

dwReceivingFlowspecSize

dwReceivingFlowspecOffset

The total size in bytes and offset from the beginning of LINECALLINFO of a WinSock2 FLOWSPEC structure followed by WinSock2 provider-specific data, equivalent to what would have been stored in ReceivingFlowspec.len in a WinSock2 QOS structure. Specifies the quality of service current in effect in the receiving direction on the call. The provider-specific portion following the FLOWSPEC structure must not contain pointers to other blocks of memory, because TAPI will not know how to marshal the data pointed to by the private pointer(s) and convey it through interprocess communication to the application.

Remarks
Device-specific extensions should use the DevSpecific (dwDevSpecificSize and dwDevSpecificOffset) variably sized area of this data structure.

The LINECALLINFO data structure contains relatively fixed information about a call. This structure is returned with lineGetCallInfo. When information items in this data structure have changed, a LINE_CALLINFO message is sent to the application. A parameter to this message is the information item or field that changed.

The dwAppSpecific field can be used by applications to tag calls by using lineSetAppSpecific. This field is uninterpreted by TAPI or service providers. It is initially set to zero.

The members dwCallTreatment through dwReceivingFlowspecOffset are available only to applications that open the line device with an API version of 0x00020000 or greater.

Note The preferred format for specification of the contents of the callerID field and the other five similar fields is the TAPI canonical number format. For example, a ICLID of "2068828080" received from the switch should be converted to "+1 (206) 8828080" before being placed in the LINECALLINFO structure. This standardized format facilitates searching of databases and callback functions implemented in applications.

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