ATT DEFINITY Communications System Generic 1, Generic 3, System Management Instructions Manual

							GLOSSARY
Call Work Code
A number, up to 16 digits, entered by ACD agents to record the occurrence of customer-
defined events (such as account codes, social security numbers, or phone numbers) on
ACD calls.
Central Office
The location housing telephone switching equipment that provides local telephone ser-
vice and access to toll facilities for long-distance calling.
Central Office Codes
The first three digits of a 7-digit public network telephone number. These codes are typi-
cally numbered from 200 through 999.
Central Office Trunk
A telecommunications channel that provides access from the system to the public net-
work through the local central office.
Channel
A communications path for transmitting voice and data.
Circuit Pack Vintage
The vintage of a circuit pack is a numeric tag to identify the Read Only Memory that
resides on that pack. It is used to facilitate recordkeeping and maintainability.
Class of Restriction (COR)
A number (0 through 63) that specifies the restrictions assigned to voice terminals, voice
terminal groups, data modules, and trunk groups.
Class of Service (COS)
A number (0 through 15) that specifies if voice terminal users can activate the Automatic
Callback, Call Forwarding-All Calls, Data Privacy, or Priority Calling features.
Common Control Switching Arrangement (CCSA)
A private telecommunications network using dedicated trunks and a shared switching
center for interconnecting company locations.
Confirmation Tone
Three short bursts of tone followed by silence; indicates that the feature activated, deac-
tivated, or canceled has been accepted.
G-7 
						

							GLOSSARY
Console
See Attendant Console.
Controlled Outward Restriction
A calling party with this feature activated is restricted from dialing outgoing exchange net-
work calls. Restricted calls are routed to the attendant, coverage, or intercept.
Controlled Restrictions
The controlled restrictions are distinct from the calling and called restrictions admin-
istered through the COR. Controlled Restrictions are activated by an attendant or by a
station with the “Console Permission” COS. The controlled restrictions are activated for
an individual terminal or for a predefined group of terminals. The COR is used to pre-
define a group of terminals.
Controlled Station-to-Station Restriction
A calling party or called party with this feature activated is restricted from placing or
receiving station-to-station calls. Restricted calls are muted to the attendant, coverage,
or intercept.
Controlled Terminatlon Restriction
A called party with this feature activated is restricted from receiving any calls. Restricted
calls are routed to the attendant, coverage, or intercept. This form of controlled restric-
tion is used in the Do Not Disturb feature to prevent termination to a user. It may be
overridden only by a priority call.
Controlled Total Restriction
A calling party or called party with this feature activated is restricted from placing or
receiving any calls. DID or APLT calls to a station with Controlled Total Restriction active
are routed to the attendant or to a recorded announcement. All other calls are routed to
intercept.
Coverage Answer Group
A group of up to eight voice terminals that ring simultaneously when a call is redirected to
it by Call Coverage. Anyone of the group can answer the call.
Coverage Call
A call that is automatically redirected from the called party’s extension number to an
alternate answering position when certain coverage criteria are met.
Coverage Path
The order in which calls are redirected to alternate answering positions.
G-8 
						

							GLOSSARY
Coverage Point
The attendant positions (as a group), Direct Department Calling group, Uniform Call Dis-
tribution group, Coverage Answer Group, a voice terminal extension, or Message Center
Hunt Group designated as an alternate answering position in a coverage path.
Covering User
The person at an alternate answering position who answers a coverage call.
D
Data Channel
A communications path between two points used to transmit digital signals.
Data Communications Equipment (DCE)
The equipment on the network side of a communications link that provides all the func-
tions required to make the binary serial data from the source or transmitter compatible
with the communications channel.
Data Endpoint
Data endpoints refer to the various Data Terminal Equipment (DTE) and Data Communi-
cations Equipment (DCE) that are connected to the system. They are associated with an
extension. In the switching environment, they can be analog or digital endpoints serving
as the interface between a host computer port and the switch, or between a data network
and the switch.
Data Terminal Equipment (DTE)
Equipment comprising the source or link of data, or both, that also provides communica-
tion control functions (protocol). DTE is any piece of equipment at which a communica-
tions path begins or ends.
D-Channel Pair
Refers to a pair of D-Channels, where one is designated as the primary D-Channel, and
the other is the secondary D-Channel.
Delay-Dial Trunk
G-9
After a request for service (called a seizure) is detected on an incoming trunk, the system
sends a momentary signal followed by a steady tone over the trunk. This informs the cal-
ling party that dialing can start. This type of trunk allows dialing directly into the system.
That is, the digits are received as they are dialed. 
						

							GLOSSARY
Designated Voice Terminal
The specific voice terminal to which calls, originally directed to a certain extension
number, are redirected. Commonly used to mean the “forwarded-to” terminal when Call
Forwarding All Calls is active.
Dialed Number Identification Service
Provides an indication (display) to the answering agent of the service (or project) or
number called by the caller so that agents grouped in one split may answer calls
appropriately for many different services.
Dial Repeating Tie Trunk
A telecommunications channel between two private switching systems. The number
dialed is repeated or dialed-in at the distant end.
Digital Communications Protocol (DCP)
Defines the capability for providing simultaneous voice and data transmission over the
same channel.
Digital Data Endpoints
Digital data endpoints include the following:
l 510D Personal Terminal or 513 BusinessCommunications Terminal
l 7404D Terminals
l 7406D or 7407D Equipped With Optional Data Module Base
l Asynchronous Data Units
l Digital Terminal Data Modules
l (Modular) ProcessorData Modules
l (Modular) Trunk Data Modules
l 3270 Data Modules
l Internal Data Channels
Digital Multiplexed Interface (DMI)
Specifies the remote interface requirements for multiplexed data communications
between a host computer and a private switching system.
Digital Terminal Data Module (DTDM)
An adjunct to 7403D or 7405D voice terminals. Provides the required interface between
the system and a data terminal such as a 513 BCT.
G-10 
						

							GLOSSARY
Digital Trunk
A circuit in a telecommunications channel designed to handle digital voice and data.
Digit Conversion
A process used to convert specific dialed numbers into other dialed numbers. ARS uses
Digit Conversion to convert public network numbers (ARS) to private network numbers
(AAR) in order to save toll charges. AAR uses Digit Conversion to convert private net-
work numbers (ARS) to other private or public network numbers (AAR).
Direct-Agent Calls
A special type of ACD call directed to a particular agent, rather than any available agent
in the split.
Direct Agent Calling (DAC)
An entry is provided in the COR to allow originating and receiving of direct-agent calls. A
direct-agent call is a special type of ACD call directed to a particular agent, rather than
any available agent in the split. A calling party that is DAC restricted is denied the ability
to originate direct-agent calls. A called party that is DAC restricted is denied the ability to
receive direct-agent calls. Restricted calls are muted to intercept.
Direct Extension Solution (DXS)
An option at the attendant console that allows an attendant direct access to voice termi-
nals by pressing a Group Select button and a DXS button.
Distributed Communications System (DCS)
The Distributed Communications System is a private network of distributed switches
linked together with trunks to form a DCS complex. The switches in the complex are
connected with data links that allow call processing information to be passed from one
switch to another. This provides feature transparencyso that certain features are per-
ceived by users to be the same whether they are talking to a station served by the same
switch or to a station on a different switch in the complex.
DS1
A DS1 trunk multiplexes up to 24 64-kbps digital channels over a 4-wire interface for data
or voice. The 64-kbps capacity is achieved by having 8000 frames of 8-bit data per
second. This trunk can be used as a timing reference for the switch or by an external
Stratum 3 clock.
G-11 
						

							GLOSSARY
E
Electronic Tandem Network (ETN)
A special tandem tie trunk network that has automatic call routing capabilities based on
the number dialed and most preferred route available at the time the call is placed. Each
switch in the network is assigned a unique RNX and each voice terminal is assigned a
unique extension number.
End-to-End Signaling
The transmission of touch-tone signals generated by dialing from a voice terminal user to
remote computer equipment. A connection must first be established over an outgoing
trunk from the calling party to the computer equipment. Then additional digits can be
dialed to transmit information to be processed by the computer equipment.
Enhanced Private Switched Communications Service (EPSCS)
A private telecommunications network that provides advanced voice and data telecom-
munications services to companies with many locations.
Expansion Interface
Used to connect an EPN to the Processor Port Network TDM Bus and provide connec-
tivity between the TDM buses on the PPN and EPNs. This circuit pack carries synchroni-
zation information between the two cabinets that it connects and also provides connec-
tivity between the packet buses on the PPN and EPNs.
Expansion Port Network
A cabinet that contains port circuit packs but noprocessor. Up to two EPNs may be con-
nected to a PPN.
Extension Number
A 1- to 5-digit number assigned to each voice terminal, certain system groups, data
modules, and various other facilities on the switch. The number is used in call process-
ing to access the facility.
External Call
A connection between a system user and a party on the public telephone network or on a
tie trunk.
G-12 
						

							GLOSSARY
F
Facility
A general term used for the telecommunications transmission pathway and associated
equipment.
Facility Restriction Level (FRL)
The FRL is used to determine the accessibility of user trunk groups in a routing pattern.
When searching for a routing pattern, the originators FRL must be greater than or equal
to the FRL for the accessed trunk group.
FAS/NFAS
Facility Associated Signaling (FAS) describes the type of signaling in which an ISDN DS1
interface D-Channel carries signaling information for only those B-Channels located on
the same DS1 facility as the D-Channel. Non-Facility Associated Signaling describes the
type of signaiing in which an ISDN DS1 interface D-Channel carries signaling information
on one DS1 facility for B-Channels located on another DS1 facility.
Feature
A specificity defined function or service provided by the system.
Feature Button
A labeled button on a voice terminal or attendant console designating a specific feature.
Foreign Exchange (FX)
A central office 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 central office other
than its local central office.
Foreign Numbering Plan Area Code
An area code other than the local area code. The foreign area code must be dialed to
call outside the local geographical area.
G-13 
						

							GLOSSARY
G
Ground-Start Trunk
On outgoing calls, the system transmits a request for services to the distant switching
system by grounding the trunk ring lead. When the distant system is ready to receive the
digits of the called number, that system grounds the trunk tip lead. When the system
detects this ground, the digits are sent. (Tip and ring are common nomenclature to dif-
ferentiate between ground-start trunk leads.) On incoming calls, detection of ground on
the ring lead is sufficient to cause the call to route to a predetermined destination, nor-
mally the system attendant group. No digits are received.
H
Handshaking Logic
A format used to initiate a data connectbn between two data module devices.
Home Numbering Plan Area Code
The local area code. The area code does not have to be dialed to call numbers within
the local geographical area.
Hospitality
Hospitality features, such as Automatic Wakeup and Do Not Disturb, are those required
for the administration of stations considered to be “guests” or “clients” of the customer.
Additionally, these features allow the customer to mnnect the system to a PMS, which is
used to collect and manage guest room information.
Hospitality Parameter Reduction
Provides the user with a reduced set of system parameters. Namely, the number of
trunks, number of hunt-groups, number of pick-up groups, and the number of coverage
paths.
Host
A customer processor that, when connected to the switch using ASAI, for example, is
considered an adjunct.
Hunt Group
A group of stations which answer calls that are distributed using a routing algorithm. An
ACD split is a special type of hunt group.
G-14 
						

							GLOSSARY
I
Immediate-Start Tie Trunk
After establishing a connection with the distant switching system for an outgoing call, the
system waits a nominal 65 milliseconds before sending the digits of the called number.
This allows time for the distant system to prepare to receive the digits. Similarly, on an
incoming call, the system has less than 65 milliseconds to prepare to receive the digits.
Information Exchange
The exchange of data between users of two
host computer) over a local area network
Initialization and Administration System (INADS)
different systems (DEFINITY Generic 1 and
An AT&T Network Operations Division (NOD) services alarm reception and trouble track-
ing system.
Integrated Services Digital Network—Primary Rate Interface (ISDN-PRI)
ISDN-PRI is an internationally accepted standard interface that provides end-to-end digi-
tal connectivity. It uses a high-speed interface which provides service-independent
access to switches services. It uses a T1 interface and supports 23 64-kbps voice or
data B-Channels and one 64-kbps signaling D-channel (on the 24th channel when using
FAS) or 24 B-Channels on one DS1 facility and a D-Channel on a separate DS1 facility
(when using Non-facility Associated Signaling) for a total bandwidth of 144 MB.
Intercept Tone
An alternating
requested.
Interfacehigh and low tone; indicates a dialing error or denial of the service
A common boundary between two systems or pieces of equipment.
Interflow
Interflow allows calls directed or redirected to one split to be redirected to an external
destination.
Internal Call
A connection between two users within the system.
G-15 
						

							GLOSSARY
Interworking
The linking of dissimilar networks to provide an end-to-end call. In public networks, inter-
working might include a Common Channel Interoffice Signaling (CCIS) path which does
not support ISDN. In private networks, a tandeming PBX might interface an existing ana-
log facility to an ISDN facility to provide calls end-to-end.
Intraflow
Intraflow allows calls that are unanswered within a predefined time, at a split to be
redirected to other splits on the same switch.
In-Use Lamp
A red lamp on a multi-appearance voice terminal that lights to show which call appear-
ance will be selected when the handset is lifted or which call appearance is active when a
user is off-hook
Inward Restriction
A called party that is inward restricted is denied the ability to receive incoming exchange
network calls, attendant originated calls, and attendant completed calls. A call that is
denied because of termination or inward restriction is routed to intercept, the attendant,
or a recorded announcement depending on the calling party. If the calling party is a DID,
Advanced Private Line Termination (APLT), or tie trunk the call is routed to the attendant
or recorded announcement,
at the customers option. In all other cases the call is routed
to intercept.
ISDN-Basic Rate Interface (ISDN-BRI)
ISDN-BRI is one of the two standard ISDN frame formats. The ISDN-BRI is typically
used to connect telephones or work stations to an ISDN-capable switching system. It
provides one 16-kbps signaling and data channel (D-channel) and two 64-kbps informa-
tion channels (B-channels). The primary purpose of the signaling channel is to convey
Q.931 message-oriented signaling for the setup and tear down of calls carried by the B-
Channels on the BRI interface.
For G1V5.0 system, ISDN-BRI is only used to provide an ASAI link to the switch in sup-
port of the Inbound Call Management feature.
ISDN Gateway
G-16
An adjunct network that forwards information from the switch to a host for data screen
delivery to agents in an ACD split.