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-13  
DND
Do not disturb
DNIS
Dialed-Number Identification Service
DOD
Direct Outward Dialing
DOSS
Delivery Operations Support System
DS1
Digital Signal Level 1
DS1C
Digital Signal Level-1 protocol C
DS1 CONV
Digital Signal Level-1 converter
DSI
Digital signal interface
DSU
Data service unit
DTDM
Digital-terminal data module
DTE
Data-terminal equipment
DTGS
Direct...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-14  
ear and mouth (E & M) signaling
Trunk supervisory signaling, used between two communications systems, whereby signaling 
information is transferred through two-state voltage conditions (on the E and M leads) for analog 
applications and through a single bit for digital applications.
EBCDIC
Extended Binary-Coded Decimal Interexchange Code
ECMA
European Computer...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-15  
ESPA
European Standard Paging Access
ETA
1. Extended Trunk Access
2. Enhanced Terminal Administration
ETN
Electronic tandem network
ETSI
European Telecommunications Standards Institute
extension-in
Extension-In (ExtIn) is the work state agents go into when they answer (receive) a non-ACD call.
extension-out
The work state that agents go into when they place...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-16  
FNPA
Foreign Numbering-Plan Area
foreign-exchange (FX)
A CO other than the one providing local access to the public telephone network.
foreign-exchange trunk
A telecommunications channel that directly connects the system to a CO other than its local CO.
foreign numbering-plan area code (FNPAC)
An area code, other than the local area code, that must be dialed to...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-17  
handshaking logic
A format used to initiate a data connection between two data module devices.
hertz (Hz)
A unit of frequency equal to one cycle per second.
HNPA
See home numbering-plan area code (HNPA)
.
holding time
The total length of time in minutes and seconds that a facility is used during a call.
home numbering-plan area code (HNPA)
The local area code....

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-18  
IDF
Intermediate distribution frame
immediate-start tie trunk
A trunk on which, after making a connection with a distant switching system for an outgoing call, the 
system waits a nominal 65 ms before sending the digits of the called number. This allows time for 
the distant system to prepare to receive digits. On an incoming call, the system has less than 65 ms...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-19  
International Telecommunications Union (ITU)
Formerly known as International Telegraph and Telephone Consultative Committee (CCITT), ITU is 
an international organization that sets universal standards for data communications, including 
ISDN. ITU members are from telecommunications companies and organizations around the world.
International Telegraph and...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-20  
LATA
Local access and transport area
LDN
Listed directory number
LEC
Local exchange carrier
LED
See light-emitting diode (LED)
.
light-emitting diode (LED)
A semiconductor device that produces light when voltage is applied. LEDs provide a visual 
indication of the operational status of hardware components, the results of maintenance tests, the 
alarm status of...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-21  
LW C
Leave Word Calling
M
MADU
Modular asynchronous data unit
main distribution frame (MDF)
A device that mounts to the wall inside the system equipment room. The MDF provides a 
connection point from outside telephone lines to the PBX switch and to the inside telephone 
stations.
maintenance
Activities involved in keeping a telecommunications system in proper...

DEFINITY® Business Communications System and GuestWorks® Issue 6 
Overview  555-231-208  Issue 1
April 2000
Glossary and Abbreviations 
GL-22  
MF
Multifrequency
MFB
Multifunction board
MFC
Multifrequency code
minor alarm
An indication of a failure that could affect customer service. Minor alarms are automatically 
displayed on LEDs on the attendant console and maintenance or alarming circuit pack, sent to the 
alarm log, and reported to a remote maintenance facility, if applicable.
MIS
Management...