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Basic Telephony Services
Basic Telephony Services are a minimal subset of the Win32 Telephony
specification. Because all service providers must support the functions of Basic
Telephony Services, applications that use only these functions will work with any TAPI
service provider. The functionality contained in Basic Telephony roughly
corresponds to the features of POTS.
Today, many programmers will use only the services provided by Basic
Telephony. But others, such as those writing code for PBX phone systems, will need the
functions of Supplementary Telephony. Soon, the demand for ISDN and other
network services, along with advancements in telephone equipment, will drive even
greater usage of Supplementary Telephony.
For a list of the functions of Basic Telephony, see Quick Function Reference.
Because control of phone devices is not assumed to be offered by all service
providers, phone-device services are considered to be optional. That is, they
are not a part of Basic Telephony. For a list of phone-device services, see the
following topic on Supplementary Telephony services, and for more information on
phone devices, see Device Classes.
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