Glossary - 2
Axxius 800 - Release 2.2
Glossary
authorization
authorization
The process of granting or denying access to a network resource. Most
computer security systems are based on a two-step process, sometimes
more. The first stage is authentication, which ensures that a user is who
he or she claims to be and in some cases, that the user is not already on
the system. The second stage is authorization, which allows the user
access in varied degrees to various resources based on the preassigned
privileges associated with the user’s identity.
B-channel
Short for Bearer-channel, the main data channel in an ISDN connection.
Basic Rate ISDN (BRI) service consists of two 64 Kbps B-channels, and
one D-channel for transmitting control information.
B8ZS
Bipolar 8-Zero Substitution, a coding scheme that maintains ones
density.
backplane
A common bus at the rear of the computer chassis connecting each circuit
card slot to the other parts of the system. Motherboards on modern PCs
are a general equivalent. It also distributes low-voltage AC and DC,
filtered and un-filtered power to each slot.
bandwidth
The amount of data that can travel through a channel in a given period of
time. Bandwidth is usually measured in cycles per second (hertz) or in
bits per second (BPS). The larger the bandwidth, the more information
the network can handle. ISDN is usually 64KB, 128KB or 256KB.
ASDL and DSL are generally faster than ISDN and sometimes faster
than cable. Cable connections are usually 500KB or 1MB. T1 is 1.5MB
and T3 is 45MB.
Basic Rate
Interface (BRI)
Basic Rate Interface is an Integrated Services Digital Network (ISDN)
interface typically used by smaller sites and customers. This interface
consists of a single 16 Kbps Data (or "D") channel plus 2 Bearer (or "B")
channels for voice and/or data.
BER
Bit Error Rate, the number of erred bits divided by the total number of
bits.
BERT
Bit Error Rate Tester
Summary of Contents for Network Device Axxius 800
Page 1: ...Axxius 800 USER MANUAL Part Number 770 0104 AG Product Release 2 2 May 2004 ...
Page 32: ...xxxii Axxius 800 Release 2 2 Table of Contents ...
Page 50: ...1 18 Axxius 800 Release 2 2 Base Platform ACO ...
Page 101: ...CHAPTER CLI Commands In this Chapter n Command Line Interface Help n CLI Commands ...
Page 392: ...8 8 Axxius 800 Release 2 2 FXO Voice Card Channel Associated Signaling CAS Conversions ...
Page 430: ...12 8 Axxius 800 Release 2 2 Power Supply Installing Replacing a Power Supply ...
Page 472: ...15 20 Axxius 800 Release 2 2 Terminal Server Router Card LEDs ...
Page 500: ...18 12 Axxius 800 Release 2 2 Maintenance Hot Swap Service Card ...
Page 532: ...C 22 Axxius 800 Release 2 2 Loopback Tests V 35 V 54 Loop ...
Page 552: ...Glossary 20 Axxius 800 Release 2 2 Glossary ...