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AuroraPresto - User Guide
BER
BERT
C
Cell
Channel
CHAP
CO
CPE
CRC
A B C D E F G H I
Glossary-4
Bit Error Ratio/Rate - a measure of transmission
quality. This is represented as the number of bits
received in error during a transmission, divided by the
total number of bits transmitted in a specific interval.
It is usually shown as a negative exponent, (for
example, 10
which means 1 out of 10
-7
error or 1 out of 10,000,000 bits are in error).
Bit Error Rate Test - usually performed with a Pseudo-
Random Bit Sequence (PRBS) payload, for the
measurement of transmission errors in data sent.
The unit of transmission in ATM - a fixed length
frame made up of 53 bytes (octets): a 5-byte header
and a 48-byte data payload.
This refers to the path for transmission of
information. It may be physical or logical.
Challenge Handshake Authentication Protocol. This is
used during PPP sessions to verify User Names and
Passwords.
Central Office. A central
belonging to a PTT.
Customer Premise Equipment.
Cyclic Redundancy Check - an algorithm that
computes a numerical value based on the bits in a
block of data. This number is transmitted with the
data and the receiver uses this information and the
same algorithm to make sure that the data has been
delivered accurately by comparing the results of the
algorithm and the number received. If they are not the
same, an error in transmission has probably
happened.
L N O P Q R S T U V W X
J K
bits are in
7
Switching
or control centre
Y Z
481801
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