tapiLineDial (Function)

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Differences between tapiDial and tapiLineDial
Limitation
Required configuration

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tapiLineDial (Function)

In french: telComposeLigne

Dials a phone number for a voice line and chooses the device to use.

PABX application: With a PABX application, each line appears as a device. Therefore, to dial on a phone line, you must:

Choose the current phone line (tapiDevice).
Number (tapiDial).

This is done by tapiLineDial.

Example

// Retrieves the list of TAPI devices
sTAPIList is string = tapiDeviceList()
// Displays the list in a Combo Box control
ListAdd(COMBO_TAPI, sTAPIList)
...
// Selects the TAPI device
IF tapiLineDial(COMBO_TAPI[COMBO_TAPI], EDT_PhoneNumber, "TestLineStatus") <> 0 THEN
Info("Click OK to hang up")
tapiHangUp()
END

PROCEDURE TestLineStatus(ValueLineStatus is int)
SWITCH ValueLineStatus
CASE tapiLineBusy: Message("The line is busy")
CASE tapiLineConnected: Message("OK, connected")
CASE tapiLineDialing: Message("Dialing in progress")
CASE tapiLineDialTone: Message("Dial tone")
CASE tapiLineDisconnected: Message("The correspondent has hung up")
CASE tapiLineProceeding: Message("Searching for your correspondent")
CASE tapiLineRingBack: Message("Ringing")
END

Syntax

<Result> = tapiLineDial(<Line to use> , <Number to dial> [, <WLanguage procedure> [, <Duration> [, <Custom parameter>]]])

<Result>: Integer

Identifier of call dialed.
0 if an error occurred. The error details are returned by ErrorInfo.

<Line to use>: Character string

Line or device to use.

Reminder: The list of telephony devices is returned by tapiDeviceList.

<Number to dial>: Character string (with quotes)

Phone number to dial.

<WLanguage procedure>: Name of optional procedure

Name of WLanguage procedure used to manage the progress of dialing. This procedure has the following format:

PROCEDURE <Procedure name>(<Line status>, <Parameter>)

The first procedure parameter (<Line status>) is an integer that can take the following values:
tapiLineBusy The line is currently busy.
tapiLineConnected The line is connected.
tapiLineDialing Dialing in progress.
Remark: If TAPI 3.1 technology is used, this constant is no longer returned.
tapiLineDialTone The line gets a dial tone.
tapiLineDisconnected The correspondent has hung up.
tapiLineProceeding The call is dialed: searching for the correspondent.
tapiLineRingBack Ringing in progress.
The second procedure parameter (<Parameter>) is the custom parameter passed to tapiLineDial.
Caution: this procedure must contain no call to the debugger (no breakpoint, no STOP keyword, no auto-stop expression, ...).

<Duration>: Optional integer or optional Duration

Maximum wait duration (in seconds). Beyond this duration, the function assumes there is no response (no one picked up). This parameter can correspond to:
an integer corresponding to the number of seconds,
a Duration variable,
Versions 23 and later
the direct indication of duration (1 s or 10 ms for example).
New in version 23
the direct indication of duration (1 s or 10 ms for example).
the direct indication of duration (1 s or 10 ms for example).
This parameter corresponds to 15 seconds by default.

<Custom parameter>: Any type, optional

Parameter passed to the WLanguage procedure.

Remarks

Differences between tapiDial and tapiLineDial

tapiDial is used in a context of a single outgoing call. The identifier of this call is not available.
tapiLineDial is used in a context where several simultaneous calls can be found. tapiLineDial returns the call identifier. Therefore, it can be easily handled (to transfer a call for example).

Limitation

tapiLineDial cannot be called in the procedure for call detection (defined by tapiListen).

Required configuration

Telephony functions use TAPI 2.0 technology and/or TAPI 3.1 technology. These technologies can be used on all systems.

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