| 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. |
