Nortel Networks 9150 - Manual (Page 523)

Remote Gateway 9150 Installation and Administration Guide 493
January 2005 Glossary
G
G.711
G.711 is the international standard for encoding telephone audio on a 64 Kbps
channel. It is a pulse code modulation (PCM) scheme operating at an 8 kHz
sample rate, with 8 bits per sample. According to the Nyquist theorem, which
states that a signal must be sampled at twice its highest frequency component,
G.711 can encode frequencies between 0 and 4 kHz. Telephone companies can
select between two different variants of G.711: A-law and m
µ-law. A-law is the
standard for international circuits.
G.726
G.726 is a standard ADPCM algorithm specified by the International
Telecommunication Union (ITU) for reducing the 64 kbps A-Law or m
µ-law
logarithmic data of a normal telephone line to 16, 24, 32, or 40 kbps.
G.729A
G.729A is a voice compression International Telecommunications Union (ITU)
standard that can be used in a wide range of applications including wireless
communications, digital satellite systems, packetized speech, and digital leased
lines. G.729A provides 8 Kbps of bandwidth for compressed speech at toll
quality (equivalent to G.726 32 Kbps ADPCM under clean channel condition).
gateway
A device that functions as a node on two or more networks, forwarding packets
from one network to addresses in the other networks. In Remote Gateway 9100
Series context, the gateway is the device on the network that directs traffic to
and from the Remote Gateway 9150 unit or RLC.
Gigabyte (Gbyte)
1 073 741 824 bytes. One Gbyte is equal to 1024 Mbytes.
General Protection Fault
A computer condition that causes a Windows application to crash. GPFs usually
occur when one application attempts to use memory assigned to another
application.
GPCP
General Purpose Computing Platform