Lucent Technologies DEFINITY Business Communications System And GuestWorks Instructions Manual

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-3  
ARS
See Automatic Route Selection (ARS)
.
ASCII (American Standard Code for Information Interchange)
The standard code for representing characters in digital form. Each character is represented by an 
8-bit code (including parity bit).
asynchronous data transmission
A method of transmitting data in which each character is preceded by a start bit and followed by a...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-4  
Automatic Circuit Assurance (ACA)
A feature that tracks calls of unusual duration to facilitate troubleshooting. A high number of very 
short calls or a low number of very long calls may signify a faulty trunk.
Automatic Number Identification (ANI)
Representation of the calling number, for display or for further use to access information about the 
caller....

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-5  
baud
A unit of transmission rate equal to the number of signal events per second. See also bit rate
 and 
bits per second (bps)
.
BCC
See Bearer capability class (BCC)
.
BCMS
Basic Call Management System
Bearer capability class (BCC)
A code that identifies the type of a call (for example, voice and different types of data). 
Determination of BCC is based on the...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-6  
busy tone
A low-pitched repeating tone that indicates the dialed number is in use.
BX.25
A version of the CCITT X.25 protocol for data communications. BX.25 adds a fourth level to the 
standard X.25 interface. This uppermost level combines levels 4, 5, and 6 of the ISO reference 
model.
bypass tie trunks
A one-way, outgoing tie trunk from a tandem switch to a main...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-7  
carrier
An enclosed shelf containing vertical slots that hold circuit packs.
carried load
The amount of traffic served by traffic-sensitive facilities during a given interval.
CAS
Call Accounting System
CCS or hundred call seconds
A unit of call traffic. Call traffic for a facility is scanned every 100 seconds. If the facility is busy, it is 
assumed to have been...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-8  
Center-Stage Switch
The Center-Stage Switch is a connection hub that provides port network communication. It is an 
essential component of a system configuration if the system is composed of more than three port 
networks.
central office (CO)
The location housing telephone switching equipment that provides local telephone service and 
access to toll facilities for...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-9  
voice and data communications services, including access to public and private networks, for 
telephones and data terminals on a customer’s premises. See also switch
.
companding
Compress + Expand. Compress the digital code prior to transmission, and expand the received 
code prior to reconstructing the analog signal. This is a nonlinear encoding technique to...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-10  
covering user
A person at a coverage point who answers a redirected call.
CP
Circuit pack
CPE
Customer-premises equipment
CPN
Called-party number
CSA
Canadian Safety Association
CSD
Customer-service document
CSSO
Customer Services Support Organization
D
DAC
1. Dial access code
2. See digital-to-analog converter (DAC)
.
data channel
A communications path between...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-11  
data terminal equipment (DTE)
Equipment consisting of the endpoints in a connection over a data circuit. In a connection between 
a data terminal and host, the terminal, the host, and their associated modems or data modules 
make up the DTE. 
DC
Direct current
DCE
Data-communications equipment
D-channel backup
A type of backup used with Non-Facility Associated...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-12  
information-bearing channels, and thus two telephones/data modules. The I1 channel is the DCP 
channel assigned on the first page of the 8411 station form. The I2 channel is the DCP channel 
assigned on the analog adjunct page of the 8411 station form or on the data module page. 
The DCP protocol supports two information-bearing channels, and thus two...