Digium, Inc.
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Appendix C Glossary and Acronyms
IAX
Inter-Asterisk eXchange
The native voice over IP (VoIP) protocol used by Asterisk. It is an IETF
standard used to enable VoIP connections between Asterisk servers, and
between servers and clients that also use the IAX protocol.
iLBC
internet Low Bitrate Codec
A free speech codec used for voice over IP (VoIP). It is designed for
narrow band speech with a payload bitrate of 13.33 kbps (frame length =
30ms) and 15.2 kbps (frame length = 20ms).
ILEC
Incumbent Local Exchange Carrier
The LECs that were the original carriers in the market prior to the entry of
competition and therefore have the dominant position in the market.
interface
A point of contact between two systems, networks, or devices.
ISO
International Standards Organization
IVR
Interactive Voice Response
An interactive technology that allows a telephone system to detect voice
and keypad input.
LED
Light-Emitting Diode
loopback
A state in which the transmit signal is reversed back as the receive signal,
typically by a far end network element.
