ATT DEFINITY Communications System Generic 3 Basic Call Management System Instructions Manual

							Issue  4  September 1995GL-1 
GL
Numerics
3B2 Message Server
An AT&T software application that comb ines voice and data messaging services for voice termi-
nal users whose extensions are connected to a G3 switch.
800 service
A servi ce in the USA, which allows incoming calls from a certain area or areas to an assigned 
number for a flat-rate charge based on usage.
A
abandoned call
An incoming call, where the caller hangs up before being answered.
access code
A 1-, 2-, or 3-digit dial code used to activate or cancel a feature, or ac c ess an outgoing trunk. The 
star (*) and  pound (#) can be used as the first d i git of an access code.
access endpoint
Either a nonsignaling  channel on a DS1 interface or a nonsignaling port on an analog tie trunk  cir-
cuit  pack that is assigned a unique extension.
access tie trunk
A trunk that connects a main communications system with a tandem  communications system in 
an electronic tandem network (ETN). An ac c ess tie trunk c an also b e used  to c onnect a system or 
tandem to a serving office or service node. Also called ‘‘access trunk.’’
ACCUNET
A trademarked name for a family of digital services offered by AT&T in the USA.
ACD
Se e Automatic Call Distribution. ACD also refers to the ‘‘Work State’’ ind i cating that the agent is 
on an ACD call.
ACD split (or split)
A group of extensions that are staffed  b y a gents trained to handle a c ertain type of incoming call. 
Valid split numbers range from 1 ~through 99. Each number identifies a unique grouping of ACD 
agent positions. ACD split is also referred to as an 
ACD hunt group or hunt group.
ACD work modes
See work modes.
active-notification association
A ‘‘link’’ that is initiated by the adjunct allowing it to receive Event Reports for a sp e cific switch 
entity, for example, an outgoing call. This association is initiated b y the adjunct via the 
Event Noti-
fic ation Request
 capability.
Glossary 
						

							Glossary
GL-2Issue  4  September 1995 
active-notification call
A call for which Event Reports are being sent over an active-notification association (communica-
tion channel) to the adjunct. Sometimes referred to as a monitored call.
active notification domains
Domains are VDNs and ACD split extensions for which Event Notification has been requested.
adjunct-control association
A relationship initiated by an application via the 
Third Party Make Call, the Third Party Take Con-
trol
 or Domain (Station) Control  capabilities to set up  calls and control calls already in progress.
adjunct-controlled calls
Include all the calls that  can be c ontrolled using an adjunct-control association. These  calls must 
have been originated via the 
Third Party Make Call or Domain (Station) Control capabilities or 
must have been taken control of via the 
Third Party Take Control or Domain (Station) Control 
capabilities.
adjunct-controlled splits
ACD splits administered to be under adjunct control. Agents logged into such splits must do all 
telephony and ACD login and/or logout and change work mode functions through the adjunct 
(except for auto-available adjunct controlled splits, whose agents may not be logged in and/or 
logged out or have their work modes changed).
adjunct-monitored calls
Include all the adjunct-controlled calls and  the a ctive-notification calls. In addition it includes calls 
which provide event reporting over domain-control asso ciations.
application
An a pplication refers to an adjunct entity that requests and  receives ASAI services or c apabilities. 
One or more applications can reside on a single adjunct. However, the switch cannot distinguish 
among several applications residing on the same adjunct and treats the adjunct, and all resident 
applications, as a single application. The terms ap p lication and adjunct are used  interchangeably 
throughout this document.
after call work (ACW) mode
In this mode, agents are unavailable to receive ACD calls. Agents should enter the ACW mode to 
p erform ACD-related activities such as filling out a form after an ACD call. If agents are in the 
Manual-In mode and disconnect from an ACD call, they automatically enter the ACW mode. 
A gents who normally use Auto-In mode can enter the ACW state by depressing the ACW button 
while on a call.
adjunct
A processor that does one or more tasks for another processor and that is optional in the configu-
ration of the other processor.
adjunct-switch application interface (ASAI)
An AT&T recommendation for interfacing adjuncts and communications systems, based on the 
CCITT Q.932 sp e cification for layer 3.
administer
To acc ess and change parameters asso ciated with the servi ces or features of a system.
Administered Connection (AC)
A dministered Connection is a feature that allows the switch to automatically establish and main-
tain end-to-end conne ctions between ac cess endpoints (trunks) and/or data endpoints (data 
modules). 
						

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administration terminal
A terminal used to administer and maintain a system. See also terminal.
Administration Without Hardware (AWOH)
Provides the ability to administer ports without the need for the associated terminals or other hard-
ware to be physically present.
abandoned call
An incoming call, where the caller hangs up before being answered.
agent (or ACD agent)
An answering position who rec eives calls that are directed to a split. A member of an ACD hunt 
group (ACD sp lit).
agents in multiple splits
An agent may b e lo g ged into more than one s plit (three maximum). If, while lo g ged into more than 
one split, the agent (1) answers an ACD call, (2) is in ACW mode for any split, or (3) makes or 
receives a direct extension call, the switch will not distribute additional ACD calls to that agent.
agent report
Provides historical traffic information for internally measured agents.
American National Standard Code for Information Interchange 
See ASCII.
analog
The representation of information by means of continuously variable physical quantities such as 
amplitude, frequenc y, and phase.
analog data
Data that is transmitted over a digital facility in analog (pulse  code modulation) form. The data 
must pass through a modem either at both ends or at a modem pool at the distant end.
analog telephone
A telephone that receives acoustic voice signals and sends analog electrical signals along the 
telephone line. Analog telephones are usually served by a single wire pair (tip and ring). The 
model-2500 telephone set is a typ i cal example of an analog telephone.
analog-to-digital converter (ADC)
A device that converts an analog signal to digital form. See also digital-to-analog converter.
angel
A microprocessor located on each port card in a processor port network (PPN). The angel uses 
the control-channel message set (CCMS) to manage c ommunications between the port card and 
the archangel on the controlling switch processing element (SPE). The a n gel also monitors the 
status of other microprocessors on a port card and maintains error counters and thresholds. See 
also archangel.
answerback code
An assigned number used to respond to a page from a code-calling or loudsp eaker-paging sys-
tem, or to retrieve a parked call.
appearance
A software process that is associated with an extension and whose p urpose is to supervise a call. 
Also called ‘‘call ap p earance,’’ ‘‘line appearance,’’ and ‘‘occurrence.’’
applications processor
A minicomputer used with several user-controlled applications such as traffic analysis and elec-
tronic documentation. 
						

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architecture
The organizational structure of a system, including hardware and/or software.
ASCII (American National Standard Code for Information Interchange)
The standard code, using a c o ded  character set consisting of 7-bit coded characters (eight bits, 
including parity check), used for information interchange among data processing systems, data 
communications systems, and associated equipment. The ASCII set consists of control charac-
ters and graphic characters.
asynchronous data transmission
A method of transmitting data in which each character is prec e ded by a start bit and followed by 
a stop bit, thus permitting data characters to be transmitted at irregular intervals. This typ e trans-
mission is a dvantageous when transmission is not regular (characters typ ed  at a keyboard). Also 
called ‘‘asynchronous transmission.’’ See also synchronous data transmission.
association
An association is a communic ation channel between the adjunct and switch for messaging pur-
poses. An active association is one which applies to an existing  call on the switch or to an exten-
sion on the call.
asynchronous data unit (ADU)
A data communic ations equipment (DCE) type device that allows direct connection between 
RS232C equipment and a digital switch.
attendant
A person at a console on a customer’s premises who provides personalized service for incoming 
callers and voice-services users by performing switching and signaling operations. See also atten-
dant console.
attendant console
The workstation used by an attendant. The attendant console allows the attendant to originate a 
call, answer an incoming  call, transfer a call to another extension or trunk, put a call on hold, and  
remove a call from hold. Attendants using the console can also manage and monitor some sys-
tem operations. Also called ‘‘console.’’ See also attendant.
Audio Information Exchange (AUDIX)
A fully integrated voice-mail system that can be used with a variety of communications systems to 
p rovide call-history data, such as subscriber identific ation and reason for redirection.
auto-in trunk groups
Those trunk groups where the CO proc esses all of the digits for the incoming call. Whenever the 
switch determines that the CO has seized a trunk from an Auto-In trunk group, it automatically 
(without processing any d igits) c onnects the trunk to the d estination. The destination will typ i cally 
b e an ACD split where(emif there are no agents available(emthe call will go into a q ueue in which 
the callers wait to be answered in the order in which they arrived.
auto-in work mode
One of four agent work modes. The work mode where an agent indicates, to the system, that the 
agent is ready to process another call as soon as the current call is completed. Specifically, if an 
agent disconnects from an ACD call while in Auto-in Work Mode, then that agent immediately 
b ec omes available to receive another ACD call. 
See Manual-In Work Mode for a contrast.
Automatic Call Distribution (ACD) split
Calls of a similar type are distributed among agents. 
						

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automatic trunk
A trunk that d oes not require the sending  or receiving  of addressing information b e cause the d es-
tination is predetermined. A request for servi ce on the trunk, called a ‘‘seizure,’’ is sufficient to 
route the call. The normal destination of an automatic trunk is the communic ations-system atten-
dant group. Also called ‘‘automatic incoming trunk’’ and ‘‘automatic tie trunk.’’
automatic restoration
A servi ce that restores disrupted  connections between access endpoints (nonsignaling trunks) 
and data endpoints (devices that connect the switch to data terminal and/or communications 
equipment). This restoration is done within se conds of a service disruption so that critical data 
ap p lications can remain operational.
auxiliary equipment
Equipment used for optional system features, su ch as Loudspeaker Paging and Musi c-on-Hold.
auxiliary trunk
A trunk used to connect auxiliary equipment, such as radio-paging equipment, to a communica-
tions system.
aux-work mode
In this mode, agents are unavailable to receive ACD calls. Agents should enter aux-work mode 
when involve d in non-ACD activities such as taking a break, going to lunc h, or placing an outgo-
in g  call.
When agents log in, they are automatically placed in the Aux-Work mode. They can then use the 
Auto-In or Manual-In feature to make themselves available to answer the first call.
Also, the last available agent in a split cannot enter the aux-work mode if any ACD calls are 
remaining in the queue. If the last available agent attempts to enter aux-work mo de, the following 
oc c urs: (1) Calls in the queue are routed to the agent until the queue is empty (2) If the last avail-
able agent has an aux-work button, the light next to the button flashes until all calls in the queue 
are answered. When the last call is answered, the light next to the button goes on steadily, and 
the agent then enters aux-work mode.
B
bandwidth
The difference, expressed in Hertz, between the defined highest and lowest frequencies in a fre-
quency range.
barrier code
A security code used with the Remote A c cess feature to prevent unauthorized ac c ess to the sys-
tem.
baud
In telecommunications applications, a unit of transmission speed equal to the number of signal 
events per second. See also bit rate and bits per second.
BCC
The Bearer Capability Class (BCC) identifies the type of a call, for example, voice and different 
typ es of data. Determination of BCC is based on the  call originator’s c haracteristics for non-ISDN 
endpoints and on the Bearer Capability and Low-Layer Compatibility Information Elements of an 
ISDN endpoint.
Current BCCs are: 
						

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n0: Voice-grade data and voice
n1: DMI Mode 1, 56 kbps data transmission
n2: DMI Mode 2, synchronous/asynchronous data transmission up to 19.2 kbps
n3: DMI Mode 3, 64 kbps circuit/packet data transmission
n4: DMI Mode 0, 64 kbps synchronous data
n5: Temporary Signaling Connection
n6: Wideband Call, 128 to 1984 kbps synchronous data
bit (binary digit)
One unit of information in binary notation having two possible states or values, 0 or 1.
bits per second (bps)
The number of binary units of information that are transmitted or received per second. See also 
baud an d bit rate.
bit rate
The speed at which bits are transmitted, usually expressed in bits per second. Also called ‘‘data 
rate.’’ See also baud and bits per second.
bridge (bridging)
The ap p earanc e of a voi ce terminal’s extension at one or more other voice terminals.
BRI
The ISDN Basi c Rate Interface sp ecification.
bridged appearance
A call appearance on a voice terminal that matches a call appearance on another voice terminal 
for the duration of a call.
buffer
(1) In hardware, a circuit or component that isolates one ele ctrical circuit from another. Ty pically, 
a buffer holds data from one circuit or process until another circuit or process is ready to accept 
the data. (2) In software, an area of memory use d for temporary storage.
bus
A multicond u ctor electrical path used to transfer information over a c ommon c onnection from any 
of several sources to any of several destinations.
business communications terminal (BCT)
An integrated digital data terminal used for business applications. A BCT c an fu n ction via a d igital 
terminal data module (DTDM) or a processor data module (PDM) as a special-purpose terminal 
for services provided  b y an a p plications processor (AP) or, as a terminal for data entry and 
retrieval.
BX.25
An AT&T version of the CCITT X.25 protocol for d ata c ommunications. BX.25 ad d s a fourth level to 
the standard X.25 interface. This  uppermost level combines levels 4, 5, and 6 of the International 
Standards Organization (ISO) reference mo del.
bypass tie trunks
A one-way, outgoing tie trunk from a tandem switch to a main switch in an electronic tandem net-
work (ETN). Bypass tie trunks, provid e d in limited quantities, are use d as a ‘‘last-choice’’ route 
when all trunks to another tandem switch are busy. Bypass tie trunks are used only if all applica-
b le intertandem trunks are busy. 
						

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Issue  4  September 1995GL-7 
byte
A sequence of (usually eight) bits processed together.
C
cabinet
Housing for rac ks, shelves, or carriers that hold electronic equipment.
cable
The physical connection between two pieces of equipment (em for examp le, c a ble from a data 
terminal to a modem (em or between a piece of equipment and a termination field (em for exam-
ple, circuit pack I/O cables.
cable connector
A cable connector is either a jack (female) or plug (male) on the end of a cable. A cable connec-
tor connects wires on a cable to specific leads on telephone or data equipment.
call appearance, attendant console
Six buttons, labeled ‘‘a’’ through ‘‘f,’’ and used to originate, receive, and hold calls. Each button 
has two lights to show the status of the call appearance.
call appearance, voice terminal
A button labeled with an extension number and used to place outgoing calls, receive incoming 
calls, or hold  calls. Two lights next to the b utton show the status of the call appearance or the sta-
tus of the call.
call control capabilities
call control c apabilities are all the c apabilities (
Third  Party Selective Hold, Third Party Reconnect, 
Third Party Merge
) that c an b e used in either of the Third Party Call Control ASE (cluster) subsets: 
Call Control and Domain Control.
call detail recording
A switch feature that utilizes software and hardware to record call data (same as CDRU).
call detail recording utility (CDRU)
Applications software that collects, stores, optionally filters, and outputs call detail records for 
direct or polled output to peripheral devices.
call management system (CMS)
An application, running on an adjunct processor, that collects information from an Automatic  Call 
Distribution (ACD) unit. CMS enables c ustomers to monitor and manage telemarketing  c enters by 
generating reports on the status of agents, splits, trunks, trunk groups, vectors, and vector direc-
tory numbers (VDNs), and enables customers to partially administer the ACD feature for a com-
munications system.
call reference value (CRV)
An identifier present in ISDN messages that serves to associate a related  sequence of messages. 
In ASAI, the CRVs distin g uish b etween associations.
call vector
A set of up to 15 vector commands to be performed for an incoming or internal call.
callback call
A call that is automatic ally returned  to a voi ce terminal user who activated the Automatic Callb a ck 
or Ring b ack Queuing feature. 
						

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GL-8Issue  4  September 1995 
call-waiting ringback tone
A low-pitched tone identical to ringback tone except that the tone decreases in the last 0.2~sec-
ond (in the United States). A call-waiting ring b ac k tone notifies the attendant that the Attendant 
Call Waiting feature has been a ctivated  and that the c alled  user is aware of the waiting c all. Tones 
in international countries may sound different.
call work code
A number, up to 16 digits, entered by Automatic Call Distribution (ACD) agents to record the 
occurrence of customer-defined events (such as account codes, so cial security numbers, or 
p hone numbers) on ACD calls.
carrier
An enclosed shelf containing vertical slots that hold circuit packs.
carried load
The amount of traffic actually serve d by traffic-sensitive facilities during a given interval.
CCS or hundred call seconds
A unit of traffic  measure that is used  to d etermine usage. In order to determine usage for a facility, 
it is scanned every 100 sec onds. If the facility is found busy, then it is assumed to have been busy 
for the entire scan interval. There are 3600 sec onds per hour. The Roman numeral for 100 is the 
capital letter ‘‘C.’’ The abbreviation for call seconds is CS. Therefore, 100  call seconds is a b brevi-
ated as CCS. If a facility is busy for an entire hour, then it is said to have been busy for 36 CCS. 
See also Erlang.
capability
A capability is a either a request or ind i cation of an operation. For example, a 
Third Party Make 
Call
 is a request for setting-up a call and an Event Report is an indication that an event has 
occurred.
capability groups
Capability groups are sets of capabilities, provisioned through switch administration, that can be 
requested by an application. Each capability group may contain capabilities from several capa-
bility groups. Capability groups are also referred to, in other d o cumentation, as administration 
groups or Application Service Elements (ASEs). Capability groups denote association types. For 
examp le, 
Call Control is a type of association which allows certain functions (the ones in the c a pa-
bility group) to be performed over this typ e of asso ciation.
cause value
A Cause Value is returned  in resp onses to requests or in event reports when a denial o ccurs or an 
unexpected condition is encountered. ASAI cause values fall into two ‘‘coding standards’’: Cod-
ing Standard 0 includes any cause values that are part of AT&T and CCITT ISDN specifications, 
and, Coding standard 3 includes any other ASAI c ause values. This d o cument uses a notation for 
cause value where the coding standard for the cause is given first, then a slash, then the cause 
value. For examp le, CS0/100 is  c o ding standard 0, cause value 100.
CCITT
CCITT (Comitte Consultatif International Telephonique et Telegraphique) is now called 
Interna-
tional Telec ommunications Union
 (ITU). See this name for information.
center stage switch (CSS)
The central interface between the processor port network (PPN) and ex p ansion  p ort networks 
(EPNs) in a CSS-conne cted system.
central office (CO)
The lo cation housing telephone switching equipment that provides local telephone service and 
ac c ess to toll facilities for long-distance calling. 
						

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Issue  4  September 1995GL-9 
central office (CO) codes
The first three d i gits of a 7-digit public network telephone number in the USA. CO codes are num-
bered from 200 through 999.
central office (CO) trunk
A telec ommunic ations channel that provides ac c ess from the system to the public network 
through the lo cal CO.
channel
The term channel is nons pecific and must be taken in context. Channel can refer to a cir-
cuit-switched call or a communications path for transmitting voice and/or data.
In wideband, a channel refers to all of the time slots necessary to support a  call. For example, an 
H0-channel uses six 64 kbps time slots. This definition of channel is the same whether the time 
slots ne cessary to sup p ort the call are contiguous or noncontiguous.
Channel c an also refer to a DS0 on a T1 or E1 fac ility not sp e cifically asso ciated  with a logical  cir-
cuit-switched call. In this context, a channel is analogous to a single trunk.
channel negotiation
Channel negotiation is the process by which the channel offered in the Channel Identification 
Information Element (CIIE) in the SETUP message is ‘‘negotiated’’ to be another channel accept-
able to the switch receiving the SETUP mess ag e  an d  ultimately to the switch that sent the SETUP. 
Negotiation will only be attempted if the CIIE is encoded as 
Preferred. Channel negotiation will not 
be attempted for wideband calls.
circuit
(1) An arrangement of electrical elements through which electric current flows, providing one or 
more specific functions. (2) A channel or transmission path between two or more points.
circuit pack
A card on which electrical circuits are printed, and integrated circuit (IC) chips and electrical 
components are installed. A circuit pack is installed in a switch carrier.
Class of Restriction (COR)
A feature that allows up to 64 classes of call-origination and  call-termination restrictions for voice 
terminals, voi ce terminal groups, data modules, and trunk groups. See also Class of Service 
(COS).
Class of Service (COS)
A feature that uses a number (0 through 15) to specify if voice terminal users can activate the 
Automatic Callback, Call Forwarding(emAll Calls, Data Priva cy, 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.
communications system
The software-controlled  proc essor complex that interprets d ialing pulses, tones, and/or keyboard 
characters and makes the proper interconnections b oth within the system and  external to the sys-
tem. The communications system itself consists of a digital computer, software, storage device, 
and carriers with special hardware to perform the actual conne ctions. A communications system 
provides voice and/or data communications services, including access to public and private net-
works, for telephones and data terminals on a customer’s premises. See also switch.
confirmation tone
A tone confirming that a feature activation, deactivation, or cancellation has been accepted. 
						

							Glossary
GL-10Issue  4  September 1995 
connectivity
The connection of disp arate devi ces within a single system.
console
See  attendant console.
contiguous
Contiguous, which is a wideband term, refers to adjacent DS0s within one T1 or E1 facility or adja-
cent TDM or fiber time slots. Note that the first and last TDM  bus, DS0, or fiber time slots are not 
considered contiguous (no wraparound). For an E1 facility with a %D-channel, DS0s 15 and 17 
are considered contiguous.
control cabinet
See  control carrier.
control carrier
A carrier in a multicarrier c a binet that contains the switch processing element (SPE) c ircuit packs 
and, unlike a G3r control carrier, port circuit packs. Also called ‘‘control cabinet’’ in a single-car-
rier cabinet. See also switch processing element.
controlled station
A station that is being monitored and   controlled via a domain-control assoc iation.
coverage answer group
A group of up to eight voice terminals that ring simultaneously when a call is redirected to it by 
Call Coverage. Any one 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.
coverage point
An extension or attendant group, vector directory number (VDN), or Automatic Call Distribution 
(ACD) split desi gnated as an alternate answering position in a coverage path.
covering user
A person at a coverage point who answers a redirected call.
critical reliability system
A system that has the following duplicated items: control carriers, tone-clock circuit packs, expan-
sion interface (EI) circuit packs, and cabling between port networks (PNs) and  center stage 
switch (CSS) in a CSS-connected system. See also duplicated common control, duplicate pro-
cessor-only system, and duplication.
D
data channel
A communications path between two points used to transmit digital signals.
data communications equipment (DCE)
The equipment (em usually a modem, data module, or packet assembler/disassembler (em on 
the network side of a communications link that provides the functions to make the binary serial 
d ata from the source or transmitter compatible with the communications channel.