Glossary - Paradyne FrameSaver 9120 User Manual

Glossary

alternate destination
ASCII
terminal/printer
asynchronous
B-channel
BKP
BRI
channel
CIR
configuration
shortcuts
DBM
DE
DLCI
DS0
DS1
DSX-1
EDLCI
excessive BPV
9121-A2-GB20-20
A designated port, DLCI, and EDLCI that provides an alternate path for backup when the
primary link or path is out of service.
Devices that can be attached, either locally or remotely, to display or print the access unit's
alarm messages.
A data transmission that is synchronized by a transmission start bit at the beginning of
a character (five to eight bits) and one or more stop bits at the end.
ISDN Bearer Channel. A 56 or 64 kbps channel that carries customer information like
voice calls, circuit-switched data, or packet-switched data.
Faceplate LED for the access unit's Backup interface.
Basic Rate Interface. An ISDN service rate of 144 kbps, provided as two B-channels of
64 kbps each for data transfer and one D-channel of 16 kbps for control and signaling.
A bidirectional DS0, voice, or data path, for electrical transmission between two or more
points. Also called a circuit, line, link, path, or facility.
Committed Information Rate. Less than or equal to the access rate, the CIR is used by the
service provider for rate enforcement when the network allocates bandwidth. When rates
exceed the CIR, frames may be discarded.
A feature that simplifies basic setup (configuration) of the access unit. Based upon the
application selected, the access unit automatically configures certain options like DLCIs
from information obtained from the network.
Dial Backup Module. The optional internal ISDN BRI feature that provides automatic dial
backup and service restoration of failed digital circuits. Provides an ISDN U-interface.
Discard Eligibility. Part of the frame header that marks a frame for low priority if there is
congestion on the network. If congestion occurs, DE frames are the first to be discarded by
the network.
Data Link Connection Identifier. The virtual circuit number corresponding to a particular
connection between two destinations. This number is used as part of the frame relay
header. The total number of DLCIs between endpoints make up the PVC. DLCIs are a
local means of identifying a PVC.
Digital signal level 0 (zero). A 64 kbps digital telecommunications signal or channel.
Digital signal level 1 (one). A digital signal transmitted at the rate of 1.544 Mbps in North
America.
Digital Signal Cross Connect level 1. An interconnection point for terminals, multiplexers
and transmission facilities.
Embedded Data Link Connection Identifier. The number or frame relay address that
identifies an individual logical link/connection when a multiplexed DLCI has been selected
for the link. Using a proprietary method, the access unit aggregates multiple frame relay
DLCIs going to the same destination access unit (also see multiplexed DLCI).
An excessive bipolar violation condition results when at least one invalid bipolar violation
has occurred every 20 milliseconds for 2 seconds. A Health and Status message (under
the Status branch/menu) is generated when this condition is detected.
May 1998
GL-1