Grandstream Networks 200 User Manual

 

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Asymmetric Digital Subscriber Line: Modems attached to twisted pair copper 
wiring that transmit from 1.5 Mbps to 9 Mbps downstream (to the subscriber) and 
from 16 kbps to 800 kbps upstream, depending on line distance. 

Automatic Gain Control, is an electronic system found in many types of devices. 
Its purpose is to control the gain of a system in order to maintain some measure of 
performance over a changing range of real world conditions. 

Address Resolution Protocol is a protocol used by the 

Internet Protocol (IP)

 

[

RFC826]

, pecifically IPv4, to map 

IP network addresses

 to the hardware 

addresses used by a data link protocol. The protocol operates below the network 
layer as a part of the interface between the OSI network and OSI link layer. It is 
used when 

IPv4 is used over Ethernet

Analogue Telephone Adapter. Covert analogue telephone to be used in data 
network for VoIP, like Grandstream HT series products. 
 

Abbreviation for Coder-Decoder. It's an analog-to-digital (A/D) and digital-to-
analog (D/A) converter for translating the signals from the outside world to 
digital, and back again. 

Comfort Noise Generator, geneate artificial background noise used in radio and 
wireless communications to fill the silent time in a transmission resulting from 
voice activity detection. 

A data packet carrying its own address information so it can be independently 
routed from its source to the destination computer 

To discard portions of a signal in order to reduce the amount of information to be 
encoded or compressed. Lossy compression algorithms ordinarily decimate while 
subsampling. 

Digital Enhanced Cordless Telecommunications: A standard developed by the 
European Telecommunication Standard Institute from 1988, governing pan-