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Appendix A

Glossary

Audio Compression Manager (ACM)
An extension of the basic Windows NT multimedia subsystem that decodes or encodes waveform-audio data before passing it to or from a waveform-audio device driver.
API Application Programming Interface; a library of function calls that allow an application developer to access functionality in a uniform and consistent way.
CT Access Natural MicroSystems' development environment for telephony applications.
CT Access Runtime Runtime software used by the NMS TSP to configure and control NMS hardware.
DLL Dynamic Link Library; a library of software object modules that can be loaded and accessed on demand.
DTMF Dual-Tone-Multi-Frequency; an in-band signaling system that uses two simultaneous voice-band tones.
inbound call A call received by an inbound application, placed by a remote party.
Kbps Kilobits per second, 1000 bits per second.
KBps Kilobytes per second, 1000 bytes per second.
NMS Natural MicroSystems Corporation.
NMS TSP A TAPI telephony service provider (TSP) component of NMS TAPI that supplies the interface between TAPI and NMS telephony hardware. See also TSP.
NMS WAVE A WAVE driver provided with NMS TAPI that supplies the interface between the Windows multimedia subsystem and NMS telephony hardware.
protocol (telephony) Defined procedure for call setup and call teardown.
PSTN Public Switched Telephone Network; a public telephone network.
WAVE Microsoft file format supporting various speech encodings, typically PCM.
TSP Telephony Service Provider: Vendor-supplied components used to provide telephony resources to applications using the TAPI interface.
TAPI Telephony Application Programming Interface: Set of functions provided by Microsoft that enables programming of telephone line-based devices in a device-independent manner. TAPI supports both speech and data transmission, allows for a variety of terminal devices, and supports connection types and call-management techniques such as conference calls, call waiting, and voice mail.
WOSA Windows Open Systems Architecture: Microsoft's software architecture that provides a single system-level interface for connecting front-end applications with back-end services. Windows Telephony is part of WOSA.

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