| Term | Definition |
|
G.703
|
An ITU standard for the physical and electrical characteristics of
various digital interfaces, including those at 64 kbps and 2.048
Mbps.
|
|
G.703.1
|
An ITU standard for voice compression.
|
|
G.dmt ADSL
|
Sometimes called "Full-rate ADSL," the G.dmt variety can download
data at -up to 8 Mbps, and send data upstream at up to 1.5 Mbps, if
the modem is located within 10,000 - 12,000 feet of the phone
company's CO (central office).
|
|
G.lite
|
A kind of asymmetric DSL technology, based on DMT modulation, that
offers up to 1.5 megabits per second downstream bandwidth, 384
Kilobits per second upstream, does not usually require a splitter
and is easier to install than other types of DSL. "G.lite" is a
nickname for the standard officially known as G.992.2.
|
|
GA
|
Gate Array.
|
|
GaAlAs
|
Gallium Aluminium Arsenide.
|
|
GaAs
|
Gallium Arsenide.
|
|
Gaussian Noise
|
Undesirable and random electromagnetic noise which may be introduced
into a medium and may disrupt transmission.
|
|
GFC
|
Generic Flow Control - A four-bit field within the ATM cell header
which may be used to identify whether or not an ATM system
implements congestion control.
|
|
GFSK
|
Gaussian Frequency Shift Keying.
|
|
GGSN
|
GPRS Gateway Serving Node.
|
|
GHz
|
Gigahertz.
|
|
Gi interface
|
Reference point between a GPRS network and an external packet data
network.
|
|
Gigabit Ethernet
|
A version of Ethernet that operates at 1 Gb/s (1000 Mb/s).
|
|
GMII
|
Gigabit Media Independent Interface.
|
|
GPIB
|
General Purpose Interface Bus.
|
|
GPRS
|
General Packet Radio Service.
|
|
GPS
|
Global Positioning System.
|
|
GSM
|
Global System for Mobile Communications, one of the leading digital
cellular systems. GSM uses narrowband TDMA, which allows eight
simultaneous calls on the same radio frequency.
|
|
Guard Band
|
Narrow frequency band left vacant between adjacent channels to allow
for detection certainty and prevent cross channel interference.
|
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