CTI:
Computer telephony integration. Integrating computers with telephone and switch systems to make, receive, and manage telephone calls.
H.323:
The Internet is a packet network; H.323 is the specification that defines packet standards for terminals, equipment, and services for multimedia communications over packet networks.
IP telephony:
Using the Internet to send, receive, or manage voice messages or real-time voice conversations.
ISDN:
Integrated services digital network. A standard for telephone line data transmission.
PBX:
Private branch exchange. A private telephone switching system located at a customer's site that switches incoming calls to extensions at the site.
T1:
A North American standard for digital transmission, also used in Hong Kong and Japan; this high-speed (1.5mbps) phone line can carry 24 simultaneous analog phone calls for a fraction of the cost of 24 single-channel lines.
TAPI:
Telephony application programming interface. A standard developed in 1993 by Microsoft and Intel. Basic TAPI calls include line configuration, device status, and call initiation and termination; TAPI 2.0 adds support for media stream routing and control, tone monitoring, and standard switch functions such as call transfers and multiline conferencing.
TSAPI:
Telephone services API. An alternative to TAPI that was jointly developed by Novell and AT&T. TSAPI was designed from the ground up for a client-server environment, with separate interfaces for the client, PC PBX server, and NetWare server.
Unified messaging:
Convergence of voice, e-mail, and fax into a central repository.
