Paradyne Hotwire 8775 User Manual page 121

Glossary
511 A random bit test 511 bytes in length.
AIS Alarm Indication Signal. A signal transmitted downstream instead of the normal signal to
preserve transmission continuity and to indicate to the rest of the network that a fault exists.
Also called a Blue Alarm.
Alternate Mark Inversion. A line coding technique used to accommodate the ones density
AMI
requirements of E1 or T1 lines.
ATI Asynchronous Terminal Interface. A menu-driven, VT100-compatible system for configuring
and managing the termination unit.
BPV Bipolar Violation. In a bipolar signal, a one (mark, pulse) which has the same polarity as its
predecessor.
bridged tap Any part of the local loop that is not in the direct talking path between the CO and the
service user.
CAP Carrierless Amplitude and Phase Modulation. A transmission technology for implementing a
DSL. Transmit and receive signals are modulated into two wide-frequency bands using
passband modulation techniques.
Carrier Detect. The received line signal detector. V.24 circuit 109.
CD
Central Office/Central Site. The PSTN facility that houses one or more switches serving
CO
local telephone subscribers.
Communications port. A computer's serial communications port used to transmit to and
COM port
receive data from a modem. The modem connects directly to this port.
CP Customer Premises.
Customer Premises Equipment. Terminal equipment on the service user's side of the
CPE
telecommunications network interface.
Central Processing Unit. The main or only computing device in a data processing system.
CPU
Cyclic Redundancy Check. A mathematical method of confirming the integrity of received
CRC
digital data.
Clear To Send. A signal indicating that the device is ready for the DTE to transmit data.
CTS
Usually occurs in response to Request To Send (RTS).
CV Code Violation. Detected when using HDB3 coding format, this is equivalent to a BPV when
using AMI coding.
DCE Data Communications Equipment. The equipment that provides the functions required to
establish, maintain, and end a connection. It also provides the signal conversion required for
communication between the DTE and the network.
Data Channel LoopBack. Loops the data received from the network interface, for all DS0
DCLB
channels allocated to the selected port, back to the network.
Digital Subscriber Line. The non-loaded, local-loop copper connection between the
DSL
customer and the first node within the network.
DSLAM Digital Subscriber Line Access Multiplexer. A platform for DSL modems that provides
high-speed data transmission over traditional twisted-pair wiring.
8700-A2-GB25-10 February 2001
GL-1