Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1627  
data service unit (DSU)
A device that transmits digital data on transmission facilities.
data terminal
An input/output (I/O) device that has either switched or direct access to a host computer or to a processor 
interface.
data terminal equipment (DTE)
Equipment consisting of the endpoints in a connection over a data circuit. In a connection between a data ter-
minal and host, the terminal,...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1628  
dial-repeating trunks
A PBX tie trunk that is capable of handling PBX station-signaling information without attendant assistance.
dial-repeating tie trunk
A tie trunk that transmits called-party addressing information between two communications systems.
DID
Direct Inward Dialing
digit conversion
A process used to convert specific dialed numbers into other dialed numbers.
digital
The...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1629  
digital trunk
A circuit that carries digital voice and/or digital data in a telecommunications channel.
DIOD
Direct Inward and Outward Dialing
direct agent
A feature, accessed only via ASAI, that allows a call to be placed in a split queue but routed only to a specific 
agent in that split. The call receives normal ACD call treatment (for example, announcements) and is mea-
sured as an ACD...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1630  
domain-controlled split
A split for which Third Party Domain Control request has been accepted. A domain-controlled split provides 
an event report for logout.
domain-controlled station
A station for which a Third_Party_Domain_Control request has been accepted. A domain-controlled station 
provides event reports for calls that are alerting, connected, or held at the station....

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1631  
duplication
The use of redundant components to improve availability. When a duplicated subsystem fails, its backup 
redundant system automatically takes over.
duplication option
A system option that duplicates the following: control carrier containing the SPE, EI circuit packs in carriers, 
fiber-optic cabling between port networks, and center-stage switch in a CSS-connected system.
DWBS...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1632  
EIA-232
A physical interface specified by the EIA. EIA-232 transmits and receives asynchronous data at speeds of up 
to 19.2 kbps over cable distances of up to 50 feet. EIA-232 replaces RS-232 protocol in some DEFINITY 
applications.
electronic tandem network (ETN)
A tandem tie-trunk network that has automatic call-routing capabilities based on the number dialed and the 
most preferred route...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1633  
ETSI
European Telecommunications Standards Institute
expansion archangel (EAA)
A network-control microprocessor located on an expansion interface (EI) port circuit pack in an expansion 
port network. The EA provides an interface between the EPN and its controlling switch-processing element.
expansion-archangel link (EAL)
A link-access function on the D-channel (LAPD) logical link that exists...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1634  
facility
A telecommunications transmission pathway and associated equipment.
facility-associated signaling (FAS)
Signaling for which a D-channel carries signaling only for those channels on the same physical interface.
FA S
Facility-associated signaling
FAT
Facility access trunk
FA X
Facsimile
FCC
Federal Communications Commission
FEAC
Forced Entry of Account Codes
feature
A specifically...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1635  
FRL
Facilities Restriction Level
FX
Foreign exchange
G
G3-MA
Generic 3 Management Applications
G3-MT
Generic 3 Management Terminal
G3r
Generic 3, RISC (Reduced Instruction Set Computer)
generalized route selection (GRS)
An enhancement to Automatic Alternate Routing/Automatic Route Selection (AAR/ARS) that performs rout-
ing based on call attributes, such as Bearer Capability Classes (BCCs),...

DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Glossary and abbreviations 
1636  
H12
An ISDN information transfer rate for 1920-kbps data defined by CCITT and ANSI standards.
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.
high-reliability system
A system having the following: two control carriers, duplicate expansion interface (EI) circuit packs in the 
PPN (in...