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Glossary
GL-6
Cisco IP Phone Models 7905G and 7912G Administrator Guide (SIP)
OL-4277-01
ITU
International Telecommunication Union. An organization established by the
United Nations to set international telecommunications standards and to allocate
frequencies for specific uses.
IVR
Interactive voice response. Describes systems that provide information in the
form of recorded messages over telephone lines in response to user input in the
form of spoken words or, more commonly, DTMF signaling. Examples include
banks that allow you to check your balance from any telephone and automated
stock quote systems.
L
LDAP
Lightweight Directory Access Protocol. Protocol that provides access for
management and browser applications that provide read/write interactive access
to the X.500 Directory.
LEC
Local exchange carrier. A local telephone company or communications common
carrier that provides ordinary local voice-grade telecommunications service
under regulation within a specified service area.
location server
A SIP redirect or proxy server uses a location server to get information about a
caller's location. Location services are offered by location servers.
M
MCU
Multipoint control unit. A bridging or switching device that supports multipoint
videoconferencing.
MGCP
Media Gateway Control Protocol.
MWI
Message waiting indication.
mu-law
Commonly written u-law. North American companding standard used in
conversion between analog and digital signals in PCM systems. Similar to the
European A-law. See also A-law and companding.