CounterPath X-Lite 4 for Windows User Guide - Manual (Page 61)

X-Lite 4 for Windows User Guide
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D Glossary
AEC Acoustic echo cancellation. Processing of the audio or video signal to reduce the echo
effect that can arise with a speakerphone or that can arise if the sound from the
speakerphone or headphone leaks into the microphone.
AGC Automatic gain control. Processing of the audio or video signal to adjust the
microphone volume level so that the other party does not hear the distortion that
might be caused by too high a microphone input or too low volume (due to too low
input level).
AVI Audio Video Interleave. A multimedia container format. AVI files contain both audio
and video data in a standard container that allows simultaneous playback.
Broadband Broad or wide bandwidth. In data transmission, the wider the band, the more data it is
possible to transmit in a given time span. A cable, DSL and ADSL connection to the
network provide broadband for data transmission. A dialup or ISDN connection
typically provide a narrow bandwidth for data transmission.
Codec The format by which audio or video streams are compressed for transmission over
networks.
Dial plan The rules that X-Lite follows in order to interpret the softphone address or phone
number that the user has entered and to modify the number or address, as required, to
ensure that the call will be placed successfully.
DTMF Dual-tone multi frequency. DTMF is the system that is used in interactive voice-
response menu systems such as the menu system for accessing voicemail messages.
The DTMF system allows the user to interact with the menu by pressing keys on a
dialpad or keyboard.
HID Human interface device. In X-Lite, if the headset is HID-compliant, the user can
configure the buttons on the device to invoke functions on X-Lite such as answering
an incoming call.
IM Instant Messaging. A technology that lets users send text message and files for near
instantaneous delivery and display on each others’ computers.
IP Internet Protocol. A data-oriented protocol used for communicating data across a
network. IP is the most common protocol used on the internet.
IP address A unique number that devices use in order to identify and communicate with each
other on a computer network using the IP standard.
Media In a VoIP phone call, the audio and video portion of the information in a call.
Compare to “Signaling”.
MWI Message Waiting Indicator. An indicator that there is a voicemail message for the
owner of an account.
Narrowband In data transmission, the wider the band, the more data it is possible to transmit in a
given time span. A cable, DSL and ADSL connection to the network provide
broadband for data transmission. A dialup or ISDN connection typically provide a
narrow bandwidth for data transmission.
Presence An instant messaging feature that allows users to share information about their
availability, mood, location and so on.
Proxy See SIP account.
PSTN Public Switch Telephone Network. The traditional land-line phone network.