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

							GLOSSARY
L
Link
A transmitter-receiver channel or system that connects two locations.
Listed Directory Number
A LDN is a publicly listed telephone number for an organization. These numbers are
administered as special extensions, each associated with a 15-character name. DID for
any of these extensions causes routing of the call to the attendant group with the ter-
minating attendant display indicating an LDN call and the name associated with the
dialed extension.
Local Clock
The tone/clock circuit pack that has a local oscillator that can be used to maintain timing
for the switch if DS1s are not used or if both DS1 primary and secondary clock refer-
ences fail.
Lookahead Interflow
Lookahead Interflow is an enhancement to Call Vectoring that checks the status of
remote ACD locations that calls may be interflowed to. For example, calls under vector
control will not interflow to a remote ACD location that is not accepting calls. This capa-
bility will be provided via the use of a private or public network ISDN-PRI connection with
the receiving switch having the capability to reject or accept the call.
Loop-Start Trunk
After establishing a connection with the distant switching system for an outgoing call, the
system waits for a signal on the loop formed by the trunk leads before sending the digits
of the called number. On incoming calls, the received request for service is sufficient to
cause the call to route to a predetermined destination, normally the system attendant
group. No digits are received.
M
Main/Satellite/Tributary
A Main switch provides: interconnection, via tie trunks, with one or more subtending
switches, called Satellites; all attendant positions for the Main/Satellite configuration; and,
access to and from the public network. To a user outside the complex, a Main/Satellite
configuration appears as a single switch, with a single LDN. A Tributary is a switch, con-
nected to the Main via tie trunks, but which has its own attendant position(s) and its own
LDN.
G-17 
						

							GLOSSARY
Manual-In
Manual-In is an ACD agent work mode that makes the agent available to receive calls
and automatically puts the agent into After Call Work mode after disconnecting from an
ACD call.
Manual Terminating Line Service
A called party that has manual terminating line service is only allowed to receive calls ori-
ginated or extended by an attendant. Termination of all other calls is denied.
Message Center
An answering service for calls that might otherwise go unanswered; an agent accepts
and stores messages for later retrieval.
Message Center Agent
A member of the Message Center Hunt Group who takes and
voice terminal users.
Miscellaneous Station Restriction
A calling party can be disallowed accessto preselected groupsretrieves messages forof terminals. The term
miscellaneousrefers to this grouping of terminals. Any or all terminals can be in a given
miscellaneous station restriction group. This restriction is controlled by the CORs
assigned to the calling party and to the terminal being accessed.All terminals in a given
miscellaneous station restriction group must be assigned the same COR. A calling party
is restricted by its COR which denies permission to call the terminal’s COR. Restricted
calls are routed to intercept.
Miscellaneous Trunk Restriction
A calling party can be disallowed access to preselected groups of trunk groups. The
term miscellaneous refers to this preselected grouping of trunk groups. Any or all trunk
groups can be in a given miscellaneous trunk restriction group. This restriction is con-
trolled by the CORs assigned to the calling party and to the trunk group being accessed.
All trunk groups in a given miscellaneous trunk restriction group must be assigned the
same COR. A calling party is restricted by its COR which denies permission to call the
trunk group’s COR. Restricted calls are routed to intercept.
Modular Processor Data Module (MPDM)
See Processor Data Module.
Modular Trunk Data Module (MTDM)
See Trunk Data Module.
G-18 
						

							GLOSSARY
Modem Pooling
Provides shared-use conversion resources that eliminate the need for a dedicated
modem when a data module accesses, or is accessed by, an analog line or trunk.
Multi-Appearance Voice Terminal
A terminal equipped with several call appearance buttons for the same extension
number. Allows the user to handle more than one call, on that same extension number,
at the same time.
Multiplexer
A device for simultaneous transmission of two or more signals over a common transmis-
sion medium.
N
Network
An arrangement of inter- and/or intra-location circuits designed to perform specific func-
tions.
Non-Facility Associated Signaling
See FAS/NFAS.
O
Offhook
Term used for the switchhook up, or the Speakerphone turned on, or the Headset
plugged in. For multi-appearance stations, the term offhook also includes choosing a call
appearance on which to originate the call.
Off-Net
Off-Net facilities (for example, WATS, FX, or CO trunk groups) are not part of a
customers private network but may be utilized to carry private network calls. Whenever
the call uses Off-Net facilities, it is called an Off-Net call.
Onhook
Term used for a depressed switchhook, the Speakerphone turned off, or the Headset
unplugged. Also, depression of the Disconnect button sends an onhook message, fol-
lowed by an offhook message.
G-19 
						

							GLOSSARY
On-Net
On-Net facilities (for example, TTI trunks, private ISDN-PRI trunks) are dedicated to a
customers private network. Whenever the call is routed over the customers private
trunking facilities, it is called an On-Net call.
Outward Restriction
A calling party that is outward restricted is denied the ability of directly accessing the
exchange network l
P
Paging Trunk
A telecommunication channel used to access an amplifier for loudspeaker paging:
Partitioned Group Numbar (PGN)
A Partitioned Group Number (PGN) is a number (1-8) assigned to different groups of
users. The PGN is used to determine the AAR/ARS servicesto be provided on a call. A
PGN is not used directly to restrict the user, it is only used as a method toindicate the
choice of call routing tables (AAR/ARS Analysis forms) to be used to process a call.
Pickup Group
A group of individuals authorized to answer any call directed to an extension number
within the group.
Port
A designation of the location of a circuit that provides an interface between the system
and lines and/or trunks.
Port Network
May be either an EPN or a PPN.
Primary Rofaronce
A DS1 circuit pack facility used as a reference for clock timing synchronization; the pri-
mary reference should be chosen to be a more reliable DS1 link.
G-20 
						

							GLOSSARY
Primary/Secondary D-Channel
The D-Channel Backup feature requires that one D-Channel be administered as the pri-
mary D-Channel, and that a second D-Channel be administered as the secondary D-
Channel. The reason for this distinction is that at certain times during the D-Channel
Backup procedures, both D-Channels are in the same state, and it is imperative in order
to avoid a deadlock situation that both switches at opposite ends of the PRI select the
same D-Channel to be put into service. In these case, the primary D-Channel is given
precedence over the secondary D-Channel.
Principal (User)
In terms of Call Coverage, a person for whom a call was originally intended.
Priority Queuing
An entry is provided in the COR to allow priority queuing. The queuing priority of a call
can be raised such that when a call with increased priority is queued, it is queued ahead
of calls of normal priority. This priority queuing is for non-vector controlled calls and
non-direct-agent calls.
Private Networking
A Private Network is a network of customer switches linked with private lines that carry
voice and data communication throughout the network. A Private Network is character-
ized by a uniform numbering plan that includes the assignment of a unique number to
each station in the network The Automatic Alternate Routing (AAR) Analysis table is
used to route private network calls.
Private Network Office Code (RNX)
The first three digits of a 7-digit private network number. These codes are numbered 220
through 999, excluding any codes that have a 0 or 1 as the second digit.
Privileged Station
A station that has been administered with console privileges allowing it to perform func-
tions normally associated with an attendant.
Processor Data Module (PDM)
Provides the required interface between the system and an Electronics Industries Associ-
ation (EIA) computer or data terminal.
Processor Port Network (PPN)
The cabinet in which the switch processor resides. Only one of these per switch is
allowed.
G-21 
						

							GLOSSARY
Property Management System (PMS)
A stand-alone computer that lodging and health services organizations use for services
such as reservations, housekeeping, billing, etc.
Protocol
A set of conventions or rules governing the format and timing of message exchanges to
control data movement and correction of errors.
Public Network
The network that can be openly accessed by all customers for local or longdistance cal-
ling.
Q
Queue
An ordered sequence of calls waiting to be processed.
Queuing
The process of holding calls in order of their arrival to await connection to an attendant,
to an answering group, or to an idle trunk.
R
Random Access Memory (RAM)
A storage arrangement whereby information can be retrieved at a speed independent of
the location of the stored information.
Read Only Memory (ROM)
A storage arrangement primarily for information retrieval applications.
Recall Dial Tone
Three short bursts of tone followed by steady dial tone; it indicates that the system has
completed some action (such as holding a call) and is ready to accept dialing.
Redirectlon Criteria
The information administered for each voice terminal’s coverage path that determines
when an incoming call is redirected to coverage.
G-22 
						

							GLOSSARY
Remote Access Barrier Code
Used with remote access trunks to limit access to the System. When a call comes in on
a remote access trunk, the user may be required to dial a barrier code to gain access. If
the user dials an invalid barrier code, the call is muted to intercept. A barrier code has
an associated COR that defines call restriction features and a COS that defines feature
restrictions. The use of barrier codes is a customer option. If barrier codes are used,
they apply to all remote access trunk groups in a given system. If they are not required,
the default barrier code’s COR is used. There may be more than one barrier code in the
system.
Remote Home Numbering Plan Area Code (RHNPA)
A foreign numbering plan area code that is treated as a home area code by the ARS
feature. Calls can be allowed or denied based on the area code and the dialed central
office code rather than just the area code. If the call is allowed, the ARS pattern used for
the call is determined by these six digits.
Removable Mass Storage Subsystem (RMSS)
A tape storage device that stores the software information for the system.
Reorder Tone
A fast-busy tone repeated 120 times a minute; indicates that at least one of the facilities,
such as a trunk or a digit transmitter, required for the call was not available at the time
the call was placed.
Restricted Call List
A list of digit strings that can be assigned to any COR.
Routing Pattern
A routing pattern is a list of up to six trunk groups that ARS and AAR use to try to select
a trunk when muting outgoing calls. There are a maximum of 254 routing patterns that
can be assigned. The patterns can be shared between the AAR and ARS features.
Trunk groups are arranged in the routing pattern in descending order of desirability (most
desirable first). If the first choice route (usually the least expensive facility) is unavail-
able, a call is attempted over the second choice route. This procedure continues until an
available route is found, or all muting preferences are exhausted.
G-23 
						

							GLOSSARY
s
Secondary Reference
The secondary reference is a backup DS1 facility used as a clock timing reference for
synchronization in case the primary reference fails or has too many slips.
Service Observing
Service observing allows users to monitor calls. Once the feature is activated and a sta-
tion call is being monitored, the activating user has the capability to toggle back and forth
between a listen-only connection and a listen/talk connection on the call. Subsequent
calls at the station can be monitored without having to reactivate the feature.
Signaling Groups
Refers to a group of B-Channels for which a given D-Channel (or D-Channel Pair) will
carry the signaling information.
Single-Line Voice Terminals
Voice terminals served by a single-line tip and ring circuit (for example, Models 500,
2500, 7101A, and 7103A).
Software
A set of computer programs that accomplish one or more tasks.
Special Information Tones (SIT)
Tones that precede certain recorded announcements provided by the network. Such
announcements are used when the caller encounters a condition that requires an expla-
nation (for example, “no such number’).
Split
A condition whereby a caller is temporarily separated from
dant. This split condition automatically occurs when the
presses the Start button.
Status Lamp
a connection with the atten-
attendant, active on a call,
A green lamp that shows the status of a call appearance or a feature button by the state
of the lamp (lighted, flashing, fluttering, broken flutter, or dark).
Stratum 3 Clock
This is the most accurate clock supported by the system; it is duplicated and has a hold-
over of 24 hours. The implementation requires external hardware to provide timing to the
TN780 Tone/Clock circuit pack.
G-24 
						

							GLOSSARY
Stroke Counts
Method used by ACD agents to record up to nine customer-defined events on a per call
basis when the CMS is active.
Suffix
A suffix is an alphabetic character (for example, A, B, or C) that is sometimes appended
to a circuit pack code (TN number). It indicates additional feature functionality of a partic-
ular circuit pack.
Switchhook
The button(s) on a voice terminal located under the receiver.
Switch Processing Elemont (SPE)
The complex of circuit packs that provide high level processing functions within the
switch.
Synchronous Data Transmission
A scheme for sending and receiving data, where data elements may occur only at regular
specified times. Sending and receiving devices must operate in step with each other.
System Manager
A person responsible for specifying and administering features and services for the sys-
tem.
System Reload
A process that allows stored data to be written from a tape into the system memory
(normally after a power outage).
T
Tandem Switch
A switch within an ETN that provides the logic to determine the best route for a network
call, possibly modifies the digits outpulsed, and allows or denies certain calls to certain
users.
Tandem Through
The switched connection of an incoming trunk to an outgoing trunk without human inter-
vention.
G-25 
						

							GLOSSARY
Tandem Tie Trunk Network (TTTN)
A private network that interconnects several customer switching systems by dial-
repeating tie trunks. Access to the various systems is dictated by codes that must be
individually dialed for each system.
Terminal Alarm Notification
A method of customer alarm notification using lamps associated with feature buttons on
multi-appearance digital or hybrid voice terminals or attendant console terminals or both.
Termination Restriction
A called party that is termination restricted is denied the ability to receive any calls at any
time.
Third Party Call Control
ASAI capabilities that allow a host/adjunct to take control of a call, to transfer the
etc.
call,
Tie Trunk
A telecommunications channel that directly connects two private switching systems.
Time Division Multiplex Bus
A special bus that is time shared by preallocating short time slots to each transmitter on
a regular basis. In a PBX, all port circuits are connected to the time division multiplex
bus permitting any port to send a signal to any other port.
Time Division Multiplexed (TDM)
A switching technique of spliting a large bandwidth into many small channels (called time
slots) in the time domain.
Time of Day Routing (TOD)
Time of Day Routing allows the routing of calls economically, based on time of day and
day of week. The customer has the option of changing the routing plan up to six times
each day for each day of the week. The choice of routing plan is made from a pool of
routing plans. These routing plans are used in conjunction with the routing of ARS and
AAR calls.
Toll Restriction
A calling party that is toll restricted cannot make calls to certain numbers defined on the
Toll List unless the number is contained on a UCL defined on the Toll Analysis form and
associated with the calling party’s COR.
G-26