Nortel RLC, Installation And Administration Manual

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398 RLC Installation and Administration Guide
Glossary Standard 4.0
F
first-level threshold
The value that represents the lowest value of the normal range for a given field
in a threshold class. The system tracks how often the value for the field falls
below this value.
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, that
states that a signal must be sampled at twice its highest frequency component,
G.711 can encode frequencies between 0 and 4 kHz. Telcos 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 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.
Gbyte
Refer to Gigabyte .