Glossary - Paradyne 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
9121-A2-GB20-00
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- or packet- switched data. Used for circuit-switched information by 9000
series access units.
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 for information transfer and one D-channel of 16 Kbps for control and signaling.
An independent data path.
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 is congested. When rates exceed
the CIR, frames may be discarded. The management path has a CIR from 0 kbps to
64 kbps.
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 DLCI is always between devices, not just between endpoint devices. The total
number of DLCIs between endpoints make up the PVC. DLCIs are a local means of
identifying a PVC.
Digital Signal level 0. A signal of worldwide standard speed for PCM digital voice channels
running at 64 kbps.
Digital Signal level 1. A signal 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. Use when multiplexing user data on a single
DLCI (comparable to having multiple DLCIs on an interface being routed to a single DLCI
on the network side). EDLCIs use a proprietary method to multiplex DLCIs that have been
selected as one end of a connection. An EDLCI is a number between 0 and 62, and it
identifies the individual connection within a multiplexed DLCI.
June 1997
GL-1