Nortel Modular Ics 6.1 System Coordinator Guide

							P0603535  02 Modular ICS 6.1 System Coordinator Guide
Glossary
A
access code: Different sequences of 
characters used to gain access to these 
Norstar features: Line pools, Call park, 
external lines, Direct-Dial telephone, 
Auto DN, and DISA DN. Destination 
codes are also a form of access code.
alarm code: A number that appears 
on the alarm telephone display, 
informing you that the  ICS has detected 
a fault in the system.
alarm telephone: A telephone that is 
designated to receive reports of Norstar 
system problems. This function is 
usually assigned to a prime telephone, 
but this can be changed under 
Feature 
settings in Sys prgrammng.
Answer button: A telephone button 
with an indicator that is used to monitor 
another telephone. The answer button 
indicates incoming calls destined for the 
other telephone. Someone working at a 
telephone with answer buttons (an 
attendant, for example) can receive all 
ringing and visual indication of 
incoming calls  for other  telephones, and 
answer those calls when necessary.
One telephone can have up to four 
Answer buttons. An Answer button is 
automatically assigned to a telephone 
when that telephone is assigned an 
Answer DN.
Answer DN: The internal or directory 
number (DN) of a telephone that is 
monitored by an Answer button. You 
can assign up to four Answer DNs to a 
telephone under Line Access in 
Terminals and Sets programming.
Autobumping: 
²¡ÚÞ
A feature that determines what the 
system does with new Call Log items 
when your Call Log is full. When Autobumping is on, a new log entry 
causes the oldest entry to be deleted. If 
Autobumping is off, your Norstar 
system does not log calls when your log 
is full.
autodial button: A memory button 
that, if programmed, provides one-touch 
dialing of external or internal numbers.
autolog options:  
²¥¡Ý
A feature that allows you to select the 
type of calls that are stored in your Call 
Log. You can choose to log calls that 
were not answered by anyone within the 
system, to log calls that were 
unanswered at this telephone but which 
were answered elsewhere in the system, 
to log all calls answered and not 
answered at this telephone, or to not 
have calls automatically logged.
Automatic Dial: A feature that allows 
you to dial without having to pick up the 
receiver or select a line. You must have 
a prime line to use Automatic Dial. 
Automatic Dial is assigned under 
Dialing options in Terminals&Sets 
programming.
Automatic handsfree: A feature 
which automatically activates handsfree 
operation when you make or answer a 
call. Automatic handsfree is assigned 
under handsfree in 
Terminals&Sets 
programming.
Automatic Hold: A feature that 
automatically places an active call on 
hold when you select another 
line.Automatic Hold (
Full AutoHold) 
is assigned in 
Lines programming.
Automatic Privacy: See Privacy.
Automatic Daylight Savings 
Time: A feature that switches the 
system to standard or daylight savings 
time at pre-programmed times. It is  
						

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Modular ICS 6.1 System Coordinator Guide P0603535  02
turned on or off under Daylight time 
in 
Sys prgrmmng.
Automatic Telephone 
Relocation:  A feature that allows a 
telephone to retain personal and system 
programming when the telephone is 
plugged into a different Norstar modular 
jack. 
Automatic Telephone 
Relocation
 is enabled under Set 
relocation in 
Sys prgrmmng.
auxiliary ringer: A separate external 
telephone ringer or bell which can be 
programmed to ring when a line or a 
telephone rings. An auxiliary ringer may 
be programmed to ring only when the 
system is in a particular schedule. 
Programming of an auxiliary ringer is 
done in 
Services programming after 
the feature has been enabled under 
Capabilities in Terminals&Sets 
programming.
B
Base station (XC 3.0 only): A 
Companion component that is mounted 
on walls and ceilings to provide a radio 
link to an office or other area where 
Companion portable telephones are 
used. Each base station houses two 
radios that allow portables to send and 
receive calls through the ICS. (See also 
Companion Wireless)
Background Music: A feature that 
allows you to hear music from the 
speaker of your Norstar telephone. It is 
available only if a music source has 
been attached to the ICS and the feature 
has been enabled under 
Feature 
settings
 in Sys prgrmmng.
Basic password: A one- to six-digit 
password that prevents unauthorized 
access to the most commonly-used 
telephone settings. The Basic password 
can be assigned and changed in 
Passwords programming.Business series terminals These 
terminals were developed to replace the 
Norstar M-series terminals. Therefore, 
their functionality closely parallels the 
M-series terminals. 
busy lamp field (BLF): A device 
with a liquid crystal display (LCD) 
panel of indicators that shows the status 
of up to 24 telephones in the Norstar 
system.  The BLF attaches to the M7310 
and T7316/T7316E telephones. 
button caps: Interchangeable plastic 
caps that fit over the buttons of Norstar 
telephones. They are used to indicate the 
features programmed onto each 
programmable memory button. Button 
caps are either pre-printed or have clear 
windows that allow you to insert labels.
Button Inquiry: 
²¥â
With this feature you can check the 
function of each programmable button 
on your system telephone.
C
Call Duration timer: ²àà
A feature that allows you to see how 
long you spent on your last call, or how 
long you have been on your present call.
Call Forward: 
²ÝA feature that forwards all the calls 
arriving at your telephone to another 
telephone in your Norstar system. To 
have calls forwarded outside the system, 
use Line Redirection.
Call Forward No Answer: A feature 
that forwards all calls arriving at your 
telephone to another designated 
telephone in your Norstar system after a 
specific number of rings. 
Call Forward 
No Answer
 is assigned under 
Capabilities in Terminals&Sets 
programming. 
						

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P0603535  02 Modular ICS 6.1 System Coordinator Guide
Call Forward On Busy: A feature 
that forwards all calls at your telephone 
to another designated telephone if your 
telephone is busy. This feature is 
assigned under 
Capabilities in Terminals&Sets programming.
Call Forward Override: An 
automatic system feature that allows 
you to call someone and ask them to 
stop forwarding their calls to you.
Call Information:  
²¡ÚÚ
Call Information allows you to display 
information about incoming calls. For 
external calls, you can display the caller 
name, telephone number and the line 
name. For an internal call, you can 
display the name of the caller and the 
internal number. You can obtain 
information about ringing, answered,  or 
held calls.
Call Log: 
²¡ÚÛEnter your Call Log to view a record of 
incoming calls. The log could contain 
the following information for each call: 
sequence number in the Call Log, name 
and number of caller, long distance 
indication, indication if the call was 
answered, time and date of the call, 
number of repeated calls from the same 
source, and name of the line that the call 
came in on. See Autobumping, Autolog 
options, and Call Log for further 
information.
Call Park:  
²àÝ
With this feature you can place a call on 
hold so that someone can retrieve it 
from any other telephone in the Norstar 
system by selecting an internal line and 
entering a retrieval code.
The retrieval code appears on the 
display of your telephone when you 
park the call. You can park up to 25 calls 
on the system at one time.
Call Park Callback: See Callback.Call Park prefix: The first digit  of the 
retrieval code of a parked call. This digit 
cannot conflict with the first digit of  any 
existing DNs, Line Pool access codes, 
the Direct-dial digit, or the external line 
access code. The default Call Park 
prefix digit is 1. It may be set to none, in 
which case Call Park is disabled. 
Call 
Park prefix is assigned under Access 
codes
 in Sys prgrmmng.
Call Pickup Directed:  
²àß
A feature that allows you to answer a 
call ringing at any system telephone by 
entering the internal number of that 
telephone before taking the call. Call 
Pickup Directed is enabled under Feature settings in Sys prgrmmng.
Call Pickup Group: See Pickup 
Group.
Call Queuing: 
²¡âÚ
If you have several calls waiting at your 
telephone, you can invoke the Call 
Queuing feature to answer them in order 
of priority.  Priority is  given to incoming 
calls, followed by callback and camped 
calls.
Callback: If you park, camp, 
or transfer a call to another telephone 
and it is not answered there, it will ring 
again at your telephone. How long the 
system will wait before Callback occurs 
is set under 
Feature settings in Sys 
prgrmmng
.
Camp-on:  
²¡Û
A feature that allows you to reroute a 
call to a telephone even if all the lines on 
that telephone are busy. To answer a 
camped call, use Call Queuing or select 
a line if the camped call  appears on your 
telephone. Priority is given to queued 
calls. Note: Systems which use a 
centralized voice mail system attached 
to a Meridian 1, can provide this service 
to all nodes of the network. 
						

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Modular ICS 6.1 System Coordinator Guide P0603535  02
Camp timeout: The length of a delay 
before a camped call is returned to the 
telephone that camped the call. The 
length of delay is set under 
Feature 
settings
 in Sys prgrmmng.
Central answering position
 
(CAP): An M7324 telephone and one 
or more CAP modules or a T7316E 
telephone and one or more KIMs that 
are designated as a CAP under 
CAP 
assign
 in Sys prgrmmng. The CAP 
provides backup answering and can be 
used to monitor the telephones within a 
Norstar system. Buttons can also be 
programmed under 
Button 
programming, in this configuration.
Class of Service (COS): The set of 
Norstar features and lines available to 
the user for a call. The Class of Service 
for a call is determined by the restriction 
filters and remote access packages 
assigned to the telephone in 
Lines 
programming. The Class of Service for 
a call can be changed by entering a six-
digit Class of Service password. 
(Internal users cannot change their 
access to features with a COS password, 
only their restriction filters.) 
Class of 
Service
 and Class of Service 
passwords are assigned in Passwords 
programming. See Remote Access.
Class of Service password: 
²ß¡
A six-digit code that allows you to 
switch from your current Class of 
Service to one that allows you to dial 
numbers prohibited by your current 
Class of Service.
Companion Wireless:  The name for 
Nortel Networks communication 
systems which use radio technology to 
transmit and receive signals between its 
components and the Norstar system. 
Companion Wireless provides mobility 
in the workplace. Calls that used to ring 
just at your Norstar set can also appear 
and ring at your portable.Companion portable telephone: 
Hand-held wireless sets which allow 
complete mobility within the reach of 
Companion base stations or an external 
antenna. Portables offer many, but not 
all, Norstar features and share much of 
the same programming as wired desk 
sets.
Conference: 
²Ü
A feature allows you to establish a 
three-person call at your Norstar 
telephone.
contrast adjustment: 
²¥àAllows you to set the contrast level of 
your telephone display.
control telephone: A control 
telephone can place the lines for which 
it has responsibility in or out of a 
Service Mode.
The direct-dial telephone is a control 
telephone for directing calls to the extra 
direct-dial telephone. A telephone is 
made a control telephone and has lines 
assigned to it in Services programming. 
Coordinated Dialing Plan: (CDP) 
This dialing plan uses a steering code to 
identify each node in a private network. 
This one-digit code becomes part of the 
set DN number rather than a separate 
code. In this way, system A might have 
codes in range 2100 to 2999, whereas 
system B might have codes in range 
3100 to 3999.
 COS: See Class of Service.
cursor: A short horizontal line that 
appears on the system telephone display 
to indicate that characters can be entered 
using the dialpad. 
						

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P0603535  02 Modular ICS 6.1 System Coordinator Guide
D
data terminal: A device, such as a 
modem, that can be used to  transfer data 
instead of sound over a telephone 
network. You cannot use Norstar 
programming to set up such devices. 
See the documentation that 
accompanies the device.
date: See Show Time or Time and 
Date.
defaults: The settings for all Norstar 
features when the system is first 
installed. Settings are changed from 
their defaults in programming. In this 
manual, default settings are shown in 
bold text.
Delayed Ring Transfer (DRT) to 
prime: After a specified number of 
rings, this feature transfers an 
unanswered call on an external line, to 
the prime telephone associated with that 
line. This feature is activated under 
Feature settings in Sys prgrmmng.
destination code: A two- to seven-
digit number that the system interprets 
and then translates into the digits that 
you want dialed out. Both the code and 
its associated dialed digits are assigned 
under Routing service in Services 
programming.
dialing restriction: See Restriction 
filter.
dialing modes: 
²¥¡Û
This feature allows you to set the dialing 
mode of your telephone. Norstar 
supports three dialing modes: 
Automatic Dial, Pre-Dial, and Standard 
Dial. All three modes support on-hook 
dialing, meaning you can dial a call 
without picking up the receiver. The 
special features of the Automatic and 
Pre-Dial modes are available only  when 
you dial on-hook.Direct-dial: A feature that allows you 
to dial a designated telephone in your 
Norstar system with a single digit, such 
as the main receptionist. As many as 
five direct dial sets can be established. 
Each telephone in the system is assigned 
to one direct-dial telephone. There is a 
single, system wide digit for calling the 
assigned direct-dial telephone of any 
telephone. Direct-dial telephones are 
established in System programming. 
Telephones are assigned to a direct-dial 
telephone under 
Capabilities in 
Terminals&Sets programming. 
Direct-dial #: A digit used system- 
wide to call the Direct-dial telephone. 
The digit is assigned under 
Access 
codes
 in Sys prgrmmng.
Direct-dial number: The digit used 
to call the direct-dial telephone.
Direct inward system access 
(DISA): The feature that allows remote 
users to dial directly into the Norstar 
system and use  Norstar features. Callers 
will hear stuttered dial tone and will be 
required to enter a Class of Service 
password to gain access to the system. 
See Remote Access.
directed pickup: See Call Pickup 
Directed.
Directory number
 (DN): A unique 
number that is automatically assigned to 
each telephone or data terminal. The 
DN, also referred to as an internal 
number, is often used to identify a 
telephone when settings are assigned 
during programming.
Default DN assignments start at 221.
DISA DN: The received number 
assigned to the Norstar direct inward 
system access facility. If a caller dials a 
number that is assigned to the 
DISA DN, the caller hears stuttered dial 
tone and must enter a Class of Service  
						

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password. Once the password is 
accepted, the caller hears system dial 
tone and can use Remote Access 
features. See Remote Access.
Disconnect Supervision: A setting 
that enables the Norstar system to detect 
if an external caller hangs up. Once an 
external caller hangs up, the Norstar 
system can disconnect its line. 
Disconnect Supervision is enabled 
under Trunk/Line data in Lines 
programming.
display: A liquid crystal display 
(LCD) on the telephone that guides you 
through feature operation and 
programming.
display button: The Norstar M7310 
telephone and M7324 telephone and the 
Business Series Terminal T7316 and 
T7316E are each equipped with three 
buttons located directly beneath the 
display. During feature operation or 
programming, some or all of these 
buttons may be used to provide further 
options. If an option is available, it is 
shown in the bottom row of the two-row 
display, directly above the 
corresponding display button. Display 
buttons are represented in this manual as 
underlined capital, such as 
OK.
DN: See Directory number.
Do Not Disturb: 
²¡Þ
A feature that stops calls from ringing at 
your telephone. Only Priority Calls will 
ring at your telephone. A line button will 
flash when you receive a call, but the 
call will not ring
.
DTMF:  See Dual tone multifrequency. 
dual tone multifrequency:  Two 
distinct telephone signaling tones used 
for dialing.
E
Emergency 911 dialing: The 
capability to access a public emergency 
response system by dialing the digits
9-1-1. State and local requirements for 
support of Emergency 911 Dialing 
service by Customer Premises 
Equipment vary. Consult your local 
telecommunications service provider 
regarding compliance with applicable 
laws and regulations.
emergency telephone: A single-line 
telephone, also referred to as a 500/2500 
telephone, that becomes active when 
there is no power to the ICS.
evening schedule:  See Schedules, 
and Services.
event message: Event messages are 
stored in the system log and displayed 
during a Maintenance session. They 
record a variety of events and activities 
in the Norstar system.
exceptions:  See Overrides. 
external call: A call to a destination 
outside the Norstar system.
External Call Forward: See Line 
Redirection.
external code: The number you dial 
to get an external line. By default it is 9, 
but this can be changed under 
Access 
codes in Sys prgrmmng. You do not 
always need an external code. It is 
primarily to support the M7100 and 
T7100 telephones, and single-line 
telephones using an Analog Terminal 
Adapter. 
external line: A line on your system 
telephone used for making calls to 
destinations outside the Norstar system. 
external music source: See Music 
source. 
						

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P0603535  02 Modular ICS 6.1 System Coordinator Guide
external paging: A feature you can 
use to make voice announcements over 
an externally-mounted loudspeaker 
connected to the ICS. The external 
speaker is not a Norstar component and 
must be supplied by the customer.
F
feature button: Many Norstar 
features are invoked by pressing the 
Feature (
²) button followed by a 
feature code. The feature button is also 
used to exit a feature.
feature code: A number that is used 
to activate a particular feature.
Feature programming: 
²¥Ü
Allows you to program a feature code 
onto a memory button.
Forward: See Call Forward.
Full Autohold (on idle line): When 
this feature is on, if you select an 
available line and then do something 
that selects another line, the first line is 
put on hold. 
Full Autohold is enabled 
under 
Trunk/Line data in Lines 
programming.
Full handsfree: See handsfree.
G
Group Listening: ²¡âÛ
A feature that allows you to have others 
in your office hear a caller through your 
telephone speaker. The caller hears you 
only when you speak into the receiver. 
They cannot hear other people in the 
office.
You can cancel Group Listen for the 
current call. Group Listen is cancelled 
automatically when you hang up the 
Group Listen call. 
H
Handsfree: 
A feature you can use to make calls 
without using the telephone receiver. 
Full Handsfree is activated under Capabilities in Terminals&Sets 
programming. When it is activated, a 
handsfree/mute button is automatically 
assigned to the telephone.
Handsfree (HF) Answerback: 
When activated, this feature 
automatically turns on the microphone 
at a telephone receiving a Voice Call so 
that the person receiving the call can 
respond without lifting the receiver. It is 
activated under 
Capabilities in Terminals&Sets programming.
Handsfree/Mute button: See 
handsfree.
Hardware:  A section in programming 
that shows what equipment has been 
installed in the ICS. This section is 
accessed by the installer. 
headset: A head-mounted or 
ear-mounted telephone receiver that is 
used instead of the hand-held receiver. 
Headsets are not Norstar components 
and must be supplied by the customer.
Held (Line) Reminder: A system 
telephone rings and displays the 
message 
On hold: LINENAM when an 
external call has been placed on hold for 
a certain period of time. The 
Held Line 
Reminder feature and Remind delay 
are set under 
Feature settings in Sys 
prgrmmng
.
HF Answerback: See handsfree 
answerback.
Hold button:  
³
This button is used to suspend calls so 
that the person using the telephone can 
perform another task without 
disconnecting the caller.
Hook Switch Flash: See Link time. 
						

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Modular ICS 6.1 System Coordinator Guide P0603535  02
Host system signaling: (Also 
referred to as end-to-end signaling.) 
System telephones can access a remote 
system or dial a number on an alternate 
carrier by means of host feature 
activation, such as Link, Pause and Run/
Stop.
Hospitality The Hospitality features 
allow business which use hospitality 
telephones, or room-based telephones, 
to control access, alarms, and 
maintenance duties through the 
telephones.
Hotline: This feature automatically 
calls a pre-assigned number when the 
telephone receiver is lifted or the 
handsfree/mute button is pressed. A 
Hotline number can be an internal or 
external number. Hotline is assigned 
under 
Capabilities in 
Terminals&Sets programming.
Hunt group:  The hunt groups feature 
allows a group of sets to be called by a 
single directory number ensuring that 
calls are easily routed to the appropriate 
group.
I
I/C: An abbreviation of intercom.
ICS (integrated communication 
system): The central hardware 
component in the Norstar system. The 
ICS has its own processor and memory, 
and provides a physical point of 
connection for the various types of 
devices, telephones, and expansion 
modules used in Norstar.
The ICS can function on its own as a 
basic system (with 32 system telephones 
and up to 48 external lines), or with the 
addition of Trunk Modules (TM) that 
supports more external lines, or Station 
Modules (SM) that support more system 
telephones.Integrated Services Digital 
Network (ISDN): A digital telephone 
service that allows for a combination 
voice and data connection over a single, 
high-speed connection. ISDN service 
can operate over the same copper 
twisted-pair telephone line as analog 
telephone service.
intercom button: A button that 
provides access to internal lines used for 
calls  within a Norstar system and access 
to external lines through a line pool or 
external code. A telephone may be 
assigned zero to eight  Intercom buttons. 
This is done under 
Line access in 
Terminals&Sets programming.
intercom keys: See Intercom button.
internal line: A line on your telephone 
dedicated to making calls to destinations 
inside your Norstar system. An internal 
line may still connect you with an 
external caller if you use it to access a 
line pool or to pick up a call using 
Norstar call handling features such as 
Call Park or Call Pickup Directed.
internal number: A number, also 
referred to as a Directory Number or 
DN, that identifies a Norstar telephone 
or device.
internal user: Someone using a 
system telephone within a Norstar 
system.
ISDN: See integrated services digital 
network.
ISDN DN:  A directory number (DN) 
used by ISDN terminal equipment 
connected to the ICS. The system uses  a 
maximum of thirty ISDN DNs.
K 
key indicator module (KIM):
This module is configured similarly to 
the CAP module except that, as an 
eKIM, it can support multiple target 
lines and Hunt Group DNs. You can  
						

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P0603535  02 Modular ICS 6.1 System Coordinator Guide
attach one or more module to a T7316E 
telephone.
L
Last Number Redial: ²Þ
A feature that allows you to redial the 
last external number you dialed.
Fixed line: 
A telecommunications line between two 
service points leased from a 
communications carrier for private use, 
usually incurring a monthly service rate. 
Fixed  lines  setting is  used  solely by data 
modules.
Least cost routing: See Routing 
service.
line: The complete path of a voice or 
data connection between one telephone 
(or other device) and another. 
Lines:  A programming section that 
allows you to assign settings to each 
trunk and external line. Lines 
programming can be done by an 
Installer or a System Coordinator Plus. 
A System Coordinator can program the 
name of a line.
Line number: A number that 
identifies an external line. The total 
number of lines depends on how many 
Trunk Modules are installed.
Line Pool:  
²ßÝA group of lines used for making 
external calls. Line pools provide an 
efficient way of giving a telephone 
access to external lines without taking 
up many line buttons. A line is assigned 
to be part of a line pool under 
Trunk/
Line data in Lines programming.
Line Redirection: 
²¡Ý
A feature that allows you to redirect all 
calls on an incoming line to a 
destination outside the Norstar system. 
Once a line is redirected it cannot be 
answered within the Norstar system. The system may be set  up to give a brief 
ring when a call comes in on a redirected 
line, under 
Capabilities in 
Terminals&Sets programming. 
This feature differs from Call Forward 
in two ways: It redirects only external 
calls, not internal calls, and it redirects 
calls to destinations outside the system. 
Call forward redirects calls only to 
destinations inside the Norstar system. 
See Call Forward.
Link: 
²àÚ
If your Norstar system is connected to a 
Private Branch Exchange (PBX), you 
can use a Link signal to access special 
features. The Link signal can also be 
included as part of a longer stored 
sequence on an External Autodial 
button or in a Speed Dial code. The Link 
symbol (
¤) uses two of the 24 spaces 
in a dialing sequence.
Long Tones: 
²¡â¡A feature that allows you to control the 
length of a tone so that you can signal 
devices such as fax or answering 
machines which require tones longer 
than the standard 120 milliseconds.
Lunch schedule:  See Schedules, 
and Services.
M
M7000 telephone This telephone has 
a no display. It does have four memory 
buttons. (Note this telephone is only 
supported on systems running Profile 2, 
3, or 4).
M7100 telephone: A telephone with 
a single line display and one 
programmable memory button without 
an indicator.
M7208 telephone: A telephone with 
a single-line display and eight 
programmable memory buttons with 
indicators. 
						

							270 / Glossary
Modular ICS 6.1 System Coordinator Guide P0603535  02
M7310 telephone: A telephone that 
has a two-line display, three display 
buttons, 10 programmable memory 
buttons with indicators, and 12 dual 
memory programmable buttons without 
indicators. An M7310 can be equipped 
with a Busy Lamp Field.
M7324 telephone: A telephone with 
a two-line display, three display buttons, 
and 24 programmable memory buttons 
with indicators. An M7324 telephone 
can be equipped with a CAP module.
Malicious Caller ID (MCID)  This 
feature is a European ETSI-based 
network feature that allows  a user to use 
²¡áà record the caller 
information at the service provider.
memory buttons: Buttons that can be 
programmed to dial frequently used 
features or numbers automatically. See 
M7100/T7100, M7208/T7208, M7310, 
T7316/T7316E, and M7324 telephone 
entries for their exact memory button 
configurations.
message: A feature that allows you to 
send a message to another Norstar user. 
The Message feature also allows you to 
know if you have any messages waiting 
and maintains a Message Waiting List to 
keep a record of your internal messages 
and your (external) voice mail 
messages.
Message Waiting Indicator: PRI 
lines can provide the signal that cause 
the set to display a message-waiting 
message, or light a lamp on the set to 
indicate a voice message.
Monitoring See Silent Monitoring.
Move Line buttons: 
²¥¡Ú
A feature that allows you to move 
assigned lines to different buttons (with 
indicators) on your telephone.Music source: A radio or other 
source of music can be connected to the 
Integrated Communication System to 
provide music for the Music on Hold 
and Background Music features. A 
music source is not part of the Norstar 
system and must be supplied by the 
customer.
N
Names:  Names can be assigned to 
System Speed Dial numbers, external 
lines, telephones, and service schedules. 
This is done in programming. You can 
use up to 16 characters to name a 
System Speed Dial number, and seven 
characters to name a telephone, line, or 
schedule. If a Name has not been 
assigned, the line number or DN will 
appear on the display instead of a name.
Network DN: A number supplied by 
the ISDN network service provider for 
ISDN terminal equipment.
Night schedule:  See Schedules, and 
Services.
O
On hold: A setting, programmed 
under 
Feature settings in Sys 
prgrmmng
, that controls whether 
external callers hear music, periodic 
tones, or silence when they are placed 
on hold. 
overlay: See Programming overlay.
overflow: A setting in 
Routing 
Service that allows users to decide 
what path an outgoing call will take if all 
the lines used in a particular route are in 
use when the call is made.
Overrides:  One component of a 
restriction filter. Overrides are numbers 
you can dial even if they are forbidden 
by a more general restriction. See 
Restrictions.