APPENDIX 2 LIST OF TERMS AND ABBREVIATIONS
AP-6
RTP Real-time Transport Protocol. A standardized packet format for delivering audio
and video over the Internet.
RSSI Received Signal Strength Indicator. Measures the strength of the wireless com-
munication device.
SIM Subscriber Identity Module. An IC card that stores the registered users subscriber
number, phone number and information. When inserted into a terminal, the termi-
nal operates on this information.
SIP Session Initiation Protocol. A protocol for converting multimedia data into packets
over an IP network. A standardized method of audio and video coding.
SIP server DNS server that acts as a proxy for each domain name based on location of each
domain.
SMS Short Message Service. A method of sending short messages over mobile devic-
es.
Streaming A method transmitting audio, visual and multimedia where the data is transmitted
and played back simultaneously.
UDI Unrestricted Digital Information. ISDN terminology for the transmission capacity of
data, video conferences, and G4 fax machines.
UPnP Universal Plug and Play. Network equipment, software and hardware that pro-
vides compatibility between peripherals and network architecture.
URL Uniform Resource Locator. Specifies where an identified resource is available and
the mechanism for retrieving it. In popular language, a URL is also referred to as
a Web address.
User Account A character string that defines individual user settings on a computer. Generally in
the form of a user name and password.
VPN Virtual Private Network. A computer network in which some of the links between
nodes are carried by open connections or virtual circuits in some larger networks
(such as the Internet), as opposed to running across a single private network.
VRRP Virtual Router Redundancy Protocol. A router multiplexing protocol. Two or more
routers are configured as a default gateway. One router will automatically take
over if the other router is faulty.
WAN Wide Area Network. Using a telephone line or dedicated line two connect two or
more computers in a geographically different location.
Term Meaning
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