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Wikipedia / Telephony service provider

A telephony service provider, as defined in Microsoft's TAPI specification, is a software interface to a physical telephony device (such as a modem) that can be accessed programmatically to perform actions such as dialing a phone number or logging a call. TSPs can be thought of as a TAPI specific driver for a telephony device.

Example

Example Windows 10 supplies:

  • hidphone.tsp

  • remotesp.tsp

  • unimdm.tsp (universal modem)

  • kmddsp.tsp (kernel mode device driver)