Nortel Modular Ics 6.0 Installer Guide

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P0992638 03Modular ICS 6.0 Installer Guide
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.
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.
Installer password:  A one-to six-
digit password that prevents 
unauthorized access to programming. 
The Installer password can be assigned 
and changed in 
Passwords 
programming.
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  
						

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Modular ICS 6.0 Installer GuideP0992638 03
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.
ISDN Call Connection Limitation 
(ICCL) This feature piggybacks on the 
call initiation request and acts as a check 
at transit PBX points to prevent 
misconfigured routes or calls with errors 
from blocking channels.
  
K
Key service unit (KSU): See ICS. 
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:  
²ßÝ
A 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. 
						

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P0992638 03Modular ICS 6.0 Installer Guide
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.
Loop Start Trunk Cartridge: The 
Trunk Cartridge that allows you to 
connect loop start trunks to the Norstar 
system. 
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.
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.
Maintenance: A type of programming 
that is used to diagnose and repair 
problems in the Norstar system. 
Maintenance requires no programmable 
settings.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, and M7324 telephone entries for 
their exact memory button 
configurations.
MCDN:  Meridian Customer Defined 
Network is a PRI SL-1 protocol that 
allows Norstar systems on a network 
with a Meridian system to share some 
Meridian call features.
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. If your system 
is serviced by a remote voice mail 
system from a third-party vendor, the 
Meridian attendant telephone uses the 
MIC/MCK buttons to activate the MWI 
lamp on telephones at other sites.
Modular ICS NVRAM cartridge: A 
replaceable cartridge containing the 
Norstar features, commonly known as 
the Feature cartridge. The ICS NVRAM 
cartridge is inserted into the ICS. 
Modular ICS ROM software 
cartridge: A PCMCIA cartridge 
containing the Norstar NA-MICS 4.0 
features. The ICS ROM software 
cartridge is inserted into the Modular 
ICS NVRAM cartridge.  
						

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Modular ICS 6.0 Installer GuideP0992638 03
Module: A component of the Norstar 
0X32 key system. Includes the 
Integrated Communication System, 
Trunk Module and Station Module.
Module status:  A heading in 
Maintenance programming that shows 
what types of Trunk Cartridges are 
connected and whether they’re busy, 
disabled, or malfunctioning.
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 Call Diversion (NCD)  
Norstar Network Call Diversion (NCD) 
is a network function that allows 
forwarding and redirection of calls 
outside the Norstar  network when using 
an ETSI ISDN line. Functionality is 
similar to that of External Call Forward 
(ECF).
Network DN: A number supplied by 
the ISDN network service provider for 
ISDN terminal equipment.Night schedule:  See Schedules, and 
Services.
NT1 (Network termination 
type 1): A device used to connect the 
U interface of a service provider and the 
S or T interface (customer equipment). 
The Modular ICS can act as an NT1 
when equipped with a BRI-U2 or 
BRI-U4 Card.
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. 
OPS: Off premise station.
OPX:  Off premise set.
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.
P
Page:  ²ßâ
A feature you can use to make 
announcements over the Norstar 
system. You can make page 
announcements over the telephone 
speakers and/or external speakers.
Page Time out: A setting that 
controls how long a Page 
Announcement can last. It can be 
assigned under 
Feature settings in Sys prgrmmng. 
						

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P0992638 03Modular ICS 6.0 Installer Guide
Page zone: An area in the office that 
receives internal page announcements 
independently of the rest of the office.
Each page zone is identified by a 
number. Telephones are assigned to 
page zones under 
Capabilities in 
Terminals&Sets programming.
Park prefix: See Call park prefix.
Park timeout: The time before an 
unanswered parked call is routed back to 
the telephone that parked it. 
Park 
timeout
 is configured under Feature 
settings in Sys prgrmmng. 
Password: A password is a specific 
sequence of digits that you enter to gain 
access to Norstar programming, to 
override dialing restrictions, or to use 
remote access with DISA. 
Passwords:  A programming section 
that allows you to assign or change COS 
passwords, Call log passwords, or any 
of the programming passwords. Under 
Passwords programming, you can only 
modify the passwords for your level of 
programming.
Pause:  
²à¡A feature that enters a 1.5-second delay 
in a dialing sequence on an external line. 
This is often required for signaling 
remote devices, such as answering 
machines, or when reaching through to 
PBX features or host systems. The 
Pause symbol 
(›) uses one of the 24 
spaces in a dialing sequence. For pulse 
dialing, 
¥ inserts a 1.5 second pause 
into the dialing sequence.
PBX:  private branch exchange.
Pickup Group:  
²àÞA telephone can be placed into one of 
nine call pickup groups. A call ringing at 
a telephone within a pickup group can 
be picked up at any other telephone 
within the same pickup group. A telephone is assigned to a pickup group 
under 
Capabilities in Terminals&Sets programming.
Pool: See Line pool.
portable telephone: See Companion 
portable telephone
Pre-dial: A feature that allows you to 
enter a number and check it on your 
telephone display before it is actually 
dialed. If the number is incorrect, you 
can edit it. The number is dialed only 
when you pick up the receiver or select 
a line.
Primary Rate Interface (PRI):  An 
ISDN interface which uses 
23 B channels and a D channel 
(23B+D). 
Prime line:  The line on your 
telephone that is automatically selected 
when you lift the receiver, press the 
Handsfree/Mute button or use an 
external dialing feature.
A 
Prime Line is assigned to a telephone 
under Line access in Terminals&Sets 
programming.
Prime Set (prime telephone): A 
telephone that provides backup 
answering for incoming calls on 
external lines. The prime telephone for a 
line will ring for any unanswered calls 
on that line. A prime telephone is 
assigned to a line under 
Trunk/Line 
data in 
Lines programming. 
Priority Call:  
²ßáIf you get a busy signal when you call 
someone in your office, you can 
interrupt them for an urgent call. This 
feature is enabled for a telephone under 
Capabilities in Terminals&Sets 
programming.
Privacy: This feature determines 
whether a Norstar user may select a line 
in use at another telephone and join an 
established call. 
Privacy is enabled  
						

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Modular ICS 6.0 Installer GuideP0992638 03
under Trunk/Line data in Lines 
programming, but can be turned on and 
off by users during individual calls.
Private line: See Private to.
Private network: A telephone 
network consisting of owned or leased 
telephone lines used to connect different 
offices of an organization independently 
of the public network.
Private Network Identifier (PNI) 
this is  an identifying digit or set of digits 
assigned to each system in a private 
network with a Meridian system. These 
codes are provided by the Meridian 
system administrator when the node is 
brought on to the network.
Private to: Allows you to select the 
telephone that will use the line 
exclusively. The line cannot appear on 
any other telephone, except the prime 
telephone for that line. Private lines 
cannot be placed into line pools. 
Private lines are assigned under 
Trunk/Line data in Lines 
programming.
Programmed release: 
²¥¡á
A feature that performs the function of 
the
 ¨ button in a programmed dialing 
sequence.
programming: Setting the way the 
Norstar system will work. Programming 
includes system-wide settings and 
individual telephone and line settings.
programming overlay: A paper 
template that is placed over the four 
memory buttons with indicators on the 
M7310, T7316 or M7324 telephone 
during programming. The overlay labels 
indicate the special function that each of 
the four buttons takes on in 
programming. public line: An external line that can 
be assigned to any telephone and to 
many telephones. A line is assigned as 
Public under 
Trunk/Line data in Lines 
programming.
public network: The regular 
telephone network that connects most 
homes and businesses.
Public Safety Answering Point 
(PSAP): This is the first point of 
contact a caller reaches after dialing 
911.
pulse/tone dialing: An external line 
setting for pulse or  tone dialing.  Pulse is 
the traditional method of dialing used by 
rotary-dial or push- button single-line 
telephones. Tone dialing allows 
telephones to communicate with other 
devices such as answering machines. 
Tone dialing is required to access the 
features that PBX systems may offer or 
to use another Norstar system remotely.
R
recall: See Link time.
receiver:  The handset of a telephone.
receiver card:  An abbreviated list of 
system feature codes that is stored under 
the telephone receiver. The card is 
found on a perforated sheet that comes 
with a system telephone.
Regression Code: Restores the 
previous system security number so that 
previously applied UTAM Activation 
Codes  and Portable Credit Codes can be 
reentered to restore full system 
operation. Also required in cases of 
system recovery. This code cannot be 
reused. 
Remind delay: A feature that causes a 
telephone to beep and display the 
message 
On hold: LINENAM when a call 
has been on hold for a programmable 
period of time. This period is the 
Remind delay. 
						

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Remote access: The ability to dial 
into a Norstar system from outside the 
system and make use of selected Norstar 
features. The lines,  features, and dialing 
capabilities available to a remote user 
are determined by the Class of Service. 
If the remote access line is answered 
with DISA, the user must enter a Class 
of Service password to gain access to 
the Norstar system features.
remote access dial restriction:  
See Remote restriction.
Remote capability:  A subset of 
Norstar features that are available to 
users connected through remote access.
Remote monitoring:  A feature that 
allows an off-site technician with a PC 
call in and troubleshoot your system 
through the built-in modem. 
Remote paging:  This feature allows 
remote users to use the Norstar paging 
feature. Access to this feature is 
governed by the Class of  Service for the 
call. See Remote Access and Class of 
Service.
Remote restriction:  A restriction 
filter applied to a line in order  to control 
which digits can be dialed during an 
incoming remote access call. It is the 
equivalent of a set filter for a remote 
user. 
remote user: Someone who calls into 
a Norstar system from a telephone 
outside that system and uses Norstar 
features or lines. See Remote Access.
Restriction filter:  Through a 
combination of restrictions and 
overrides, restriction filters prevent 
certain telephone numbers or feature 
codes from being dialed. Restriction 
filters can be applied to lines, sets, 
specific lines on a set, and to Class of 
Service passwords. The Norstar system 
can handle up to 100 restriction filters.Restriction service:  A Services 
section that allows you to assign 
alternate dialing filters to lines, 
telephones, lines on a particular 
telephone, and alternate remote filters to 
lines at specified times of the day and on 
specified days.
restrictions: One component of a 
Dialing filter. Restrictions are numbers 
you cannot dial when that dialing filter 
is in effect. See Exceptions.
Ring Again: 
²Û
A feature that can be used when you 
cant get through to someone on your 
Norstar system because their telephone 
is busy or there is no answer. Ring 
Again instructs the Norstar system to 
inform you when they hang up or next 
use their telephone.
ring group:  A setting under Services 
that allows you to assign a number of 
different telephones to ring during one 
of the schedules.Up to 20 ring groups 
can be programmed by an installer or a 
system coordinator plus.
ring type: 
²¥ß
A feature that allows you to select one of 
four distinctive rings for your telephone.
ring volume: 
²¥¡âA feature that allows you to set the 
volume at which your telephone rings.
ringing service: A Services section 
that allows you to make additional 
telephones ring at specified times of the 
day and on specified days.
Rls button: Ends a call in the same 
way that hanging up the receiver does. 
The Release button may also be used to 
end programming, Maintenance 
sessions, and feature operations.
Routing: See Routing service.
Routing service: A programming 
section that allows outgoing calls to be 
directed automatically based on the 
numbers a caller dials. For Norstar  
						

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Modular ICS 6.0 Installer GuideP0992638 03
systems linked in a network, routing can 
create a transparent or coordinated 
dialing plan. It can also be used to direct 
calls to the least expensive lines 
according to a Services schedule 
(sometimes called least cost routing). 
Run/Stop: 
²¥áA feature that creates a break point in a 
programmed external dialing sequence. 
When you press a programmed key, the 
system dials the number up to the run/
stop. When you press it again, the 
system dials the digits following the run/
stop.
S
S loop:  A type of loop provided by a 
BRI-ST Card. It connects the ICS to 
ISDN terminal equipment which uses an 
S interface.
SAPS:  See station auxiliary power 
supply.
Saved Number Redial: 
²ßà
A feature that allows you to save the 
number of the external call you are on 
(providing you dialed the call) so that 
you can call it again later.
Schedules:  Any of six different sets 
of services that can be applied to your 
Norstar system. A schedule can be 
activated manually from a control 
telephone or activated automatically at 
specified times. See also Services.
Selective line redirection: See Line 
Redirection.
Service modes See Services.
Service Profile Identifier: See 
SPID.
Services:  A programming section 
that allows  you  to assign which 
telephones ring, which restrictions 
apply, and which call routing is used 
during any of six different schedules. 
There are three services: Ringing service, Restriction service and Routing 
service, all found in Services 
programming. 
set: A telephone.
Set Copy: A programming section 
that allows you to copy programmable 
settings from one telephone to another 
of the same type. Set Copy provides two 
options: duplicating System Data and 
User Data, or duplicating System Data 
only. Set Copy does not provide the 
same copy capability as 
COPY, which is 
more selective of the settings that can be 
duplicated.
Set filter: See Restriction filter.
Set lock (telephone lock): This 
feature allows you to limit the number 
of features that may be used or 
programmed at a telephone. Full set 
lock allows very few changes or 
features, Partial set lock allows some 
changes and features, and No set lock 
allows any change to be made and any 
feature to be used. Set lock is assigned 
under Capabilities in Terminals and Sets 
programming.
Set relocation: See Automatic 
Telephone Relocation.
shift button: A small triangular 
button beside the dual memory buttons 
on the upper half of the M7310 
telephone. You press the shift button to 
store or access features on the top half of 
the dual memory buttons.
Show Time:  
²¡âÜWhile on a call, accessing this feature 
allows you to see the current date and 
time on the Norstar telephone display.
Software keys:  A programming 
section used to enable the optional 
Remote monitoring feature. One setting 
provides a System ID, which an installer 
or system coordinator plus then uses to 
request three password keys from the 
Nortel Customer Response Center.  
						

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P0992638 03Modular ICS 6.0 Installer Guide
Once these three passwords have been 
entered, the system will permit Remote 
monitoring. 
SPID (Service Profile Identifier): 
A number that identifies devices 
connected to an ISDN network. A 
device may have more than one SPID 
depending on the number  of channels it 
uses. SPIDs may be used to identify 
terminal equipment to the ICS, or to the 
service provider.
Startup programming: When a 
Norstar system is first installed and 
powered up,  Startup programming must 
be performed before any programming 
can be done. Startup initializes the 
system programming to defaults.
Station: An individual telephone or 
other Norstar device.
Station Auxiliary Power Supply 
(SAPS):  A device which provides 
power to a Norstar telephone that is 
connected more than 300 m (975 ft.) and 
less than 1200 m (3900 ft.) from the 
ICS, or to a CAP module.
Station Module: A module that 
allows you to connect up to 16 
additional telephone to your Norstar 
system.
Station set test:  
²¡âÞ
A series of diagnostic tests for these 
components of a Norstar telephone: 
display, buttons, handset, speaker, and 
power. 
System coordinator: The person 
responsible for customizing the Norstar 
system through programming and for 
helping co-workers use the Norstar 
system.
System coordinator password:  A 
one- to six-digit password that prevents 
unauthorized access to programming. The System coordinator password can 
be assigned and changed in Passwords 
programming. 
System coordinator plus:  A 
system coordinator who also performs 
technical and maintenance functions for 
the Norstar system.
System coordinator plus 
password:  A one- to six-digit 
password that prevents unauthorized 
access to programming. The System 
coordinator plus password can be 
assigned and changed in Passwords 
programming. 
System coordinator plus 
programming:  A combination of 
common and installer programming 
settings. 
Press 
² ¥¥‚¯öìéí, 
then  
ꂸñèê to access 
System coordinator plus programming. 
System coordinator 
programming:  The programming 
settings that are most commonly 
changed once the Norstar system is 
installed. 
Press 
²¥¥‚¯öìéí, 
then  
 to access System 
coordinator programming.
system data: An option in the Set 
Copy function. System Data refers to 
the programmable system settings that 
apply to all telephones and lines. 
System programming:  A 
programming section that allows you to 
assign and maintain certain settings on 
the Norstar system. System 
programming is performed by an 
installer or system coordinator plus.
System speed dial code: A three-
digit code (001 to 255) that can be 
programmed to dial  a telephone number 
up to 24 digits long. System speed dial 
codes are programmed for the entire 
Norstar system under the System Speed 
programming heading. 
						

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Modular ICS 6.0 Installer GuideP0992638 03
System Startup: See Startup 
programming.
System Startup access code: To 
begin System Startup, press 
². An 
Installer password is required before 
Startup programming can begin.
System ID: The System ID (or System 
Security number) can be accessed on 
any programming telephone display by 
pressing 
²¥¥êçêéë, or 
²¥¥àáàÝÜ.
System-wide Call Appearance 
(SWCA) keys 
²¥ÞÛâto 
²¥ÞÜÞ These 16 feature 
codes can be assigned to buttons with 
indicators on a group of telephones to 
provide call appearance for incoming 
calls that can be answered by any 
telephone in the group. At the same 
time, the indicator displays the current 
status of the call. 
T
T1: Digital carrier system or line that 
carries data at 1.544 Mbps.
T7000 telephone This telephone has 
a no display. It does have four memory 
buttons. This telephone functions in the 
same way as the M7000 telephone. 
(Note this telephone is only supported 
on systems running Profile 2, 3, or 4).
T7100 Business Series Terminal: 
A telephone with a single line display 
and one programmable memory button 
without an indicator.
T7208 Business Series Terminal: 
A telephone with a single-line display 
and eight programmable memory 
buttons with indicators.M7316 Business Series Terminal: 
A telephone that has a two-line display, 
three display buttons, 16 programmable 
memory buttons with indicators, and 12 
memory programmable buttons  without 
indicators.
T7406 telephone: This portable 
handset functions very similarly to the 
T7310 telephone. Functions and 
installation are all described in separate 
documentation specific to the telephone.
T loop:  A type of loop provided by a 
BRI-ST Card. It connects the ICS to an 
ISDN network using an NT1.
Target lines:  Lines used to answer 
incoming calls  only. A target line routes 
a call according to digits it receives from 
an incoming trunk. They are referred to 
by line numbers in the same way as 
physical lines.
TE: See Terminal equipment. 
TEI (Terminal Endpoint 
Identifier): A digit used to identify 
devices which are using an ISDN 
connection for D-channel packet 
service.
Telco features:  A programming 
section that allows you to specify the 
external telephone numbers that are 
dialed by the Message feature to retrieve 
voice messages, or to set up CLASS 
(CMS) services for lines and sets. Telco 
features  are accessed by an installer or a 
system coordinator plus.
Terminal Endpoint Identifier: See 
TEI.
Terminal equipment (TE):  A 
generic term for devices that connect to 
an ISDN network. Examples of ISDN 
TE are ISDN telephones, computers 
equipped with ISDN cards and video 
terminals.
Terminals and Sets:  A 
programming section that allows you to 
assign and change settings that apply to