Comments (1)
Try testing with the Tapi Browser in the Windows SDK. The library is reporting what TAPI tells it -- which is what the driver is telling TAPI. My guess is you don't have the right drivers installed for your hardware, or the manufacturer isn't providing phone support - only line (which is very common).
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Related Issues (20)
- TapiVersion enum is missing the value for V22 HOT 2
- ArgumentOutOfRangeException while getting forwarding information on TAPI < 3.1
- TcMon frozen UI HOT 1
- Trouble getting device configuration
- NuGet package no longer targets .NET 4.0 HOT 2
- ArgumentOutOfRangeException in LineCapabilities ctor
- 64 and 32 bit builds HOT 6
- Trouble getting a SIP Device HOT 2
- Error compiling - Cryptographic failure --Error signing assembly-- CS1548 HOT 1
- LineMakeCall throws ObjectDisposedException HOT 1
- Retrieve IP Address of Phone HOT 1
- lineOpen failed; The operation failed for unspecified reasons HOT 2
- .NET Core support: "System.PlatformNotSupportedException" for delegate BeginInvoke HOT 1
- lineGenerateTone failed; "The operation is not supported by the underlying service provider"
- Possible ObjectDisposedException on starting a call - SafeHandle may have been disposed
- [BUG] Ringing event does not fire
- NuGet out of Date
- lineOpen failed [0xFFFFFFFF8000004B]
- Exception while using GetRelatedConferenceCalls() from within OnCallStateChange() callback
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