Nortel Modular Ics 6.0 Installer Guide

							Dialing plans / 101
P0992638 03Modular ICS 6. 0 Installer Guide
In the above example:
If a user in New York calls Toronto within the network, they 
dial 6221. The local Norstar checks the number against the 
routing tables and routes the call according to the destination 
code 6, which places the call using Route 001. 
There is no DialOut change to the number from New York, so 
the call appears on the auto answer line on the Norstar in Santa 
Clara as 6-221. 
Because 6 is also a destination code on the Santa Clara system, 
another call is placed using route 002 from Santa Clara. This 
call arrives at the Toronto system, where the digits 6-221 are 
interpreted as a target line received number. The call will now 
alert at telephone 6221 in Toronto.
Absorb0
Normal rte001
To Santa Clara:
Routing serviceDestCode2
Absorb0
Normal rte001
HeadingParameterSetting  
						

							102 / Dialing plans
Modular ICS 6.0 Installer GuideP0992638 03
Dialing plans with shared line pools
Using routes and destination codes is a powerful and efficient 
way to create a transparent dialing plan. Line pools offer an 
alternate method of creating a dialing plan or supplementing 
the routing and destination codes. This is the type of dialing 
plan you would create for tandem networking between two or 
more Norstar systems.
If the Norstar systems are close to each other geographically, 
you can conserve resources by not duplicating access. For 
example, system A, B, and C are all within the same area code. 
System A has a line pool to Santa Clara, System B has a line 
pool to Montreal, and system C has a line pool to Miami. 
A Norstar user in system A can reach Miami by calling system 
C and using that line pool to Miami.
To simplify access between Norstar systems, all line pools that 
go to the same destination should have the same line pool 
access code. For example, system A and system B both have a 
line pool to Ottawa. You can configure both systems with the 
same line pool access code for the Ottawa line pool.
A dialing plan similar to the one in the following figure allows 
you to create a company directory that uses line pool access 
codes and unique DNs of a uniform length. 
						

							Dialing plans / 103
P0992638 03Modular ICS 6. 0 Installer Guide
Networking with shared line pools
For instance, the person on system A at telephone 234 can 
press an Intercom button and dial 7434. 
This means that telephone 234 has dialed the line pool access 
code of the trunk to system C, and will receive the dial tone of 
system C. The digits 434 then map to the Received number 
434, and ring telephone 434 with an appearance of the 
associated target line.
Tips - Network calls that use rou tes are subject to any 
restriction filters that are in effect.
Network #: 5234
Rec’d #: 234
Internal #: 234Network #: 6334
Rec’d #: 334
Internal #: 334
Network #: 8534
Rec’d #: 534
Internal #: 534Network #: 7434
Rec’d #: 434
Internal #: 434 E&M trunk
E&M trunk
E&M trunkE&M trunk
E
&M t
runk
E&M trunk
N orstar AN orstar B
N orstar D Norstar CPool A(6)
Pool B (7)
Pool C (8)Pool A(5)
Pool B (8)
Pool C (7)
Pool A(5)
Pool B (6)
Pool C (7)Pool A(6)
Pool B (5)
Pool C (8) 
						

							104 / Dialing plans
Modular ICS 6.0 Installer GuideP0992638 03
Call-by-Call Services Example
This example highlights the use of PRI Call-by-Call Services.
It shows two offices of a company. One office is in New York, 
the other is in Toronto. Each office is equipped with a Norstar 
system and a PRI line. Each office has to handle incoming and 
outgoing calls to the public network. In addition, employees at 
each office often have to call colleagues in the other office. To 
reduce long-distance costs, and to allow for a coordinated 
dialing plan between the offices, private (tie) lines are used to 
handle inter-office traffic.
If the telephone used to make a network call has an 
appearance of a line used by the route, the call will move from 
the intercom button to the line button.
The telephone used to make a network call must have access 
to the line pool used by the route.
Network calls are external calls, even though they are dialed 
as if they were internal calls. Only the features and 
capabilities available to external calls can be used.
When programming a button to dial a Network number 
automatically (autodial), network calls must be treated as 
external numbers, even though they resemble internal 
telephone numbers (DNs).
Routes generally define the path between your Norstar switch 
and another switch in your network, not other individual 
telephones on that switch. 
						

							Dialing plans / 105
P0992638 03Modular ICS 6. 0 Installer Guide
Call-by-Call routing
If call-by-call services were not used, each Norstar system 
might have to be equipped with the following trunks:
12 DID lines needed to handle peak incoming call traffic.
eight Tie (E&M) lines needed to handle inter-office calls.
eight lines needed to handle outgoing public calls
The total required is 28 lines. If the Norstar systems were using 
T1 trunks, then two T1 spans would be required at each office. 
Note that the total of 28 lines represents the worst case value 
for line usage. In reality, the total number of lines in use at any 
one time will generally be less than 28. For example, during 
periods of peak incoming call traffic, the demand for outgoing 
lines will be low.
With PRI call-by-call services, it is not necessary to configure 
a fixed allocation of trunks. Each of the 23 lines on the PRI can 
be used for DID, Tie, or outgoing public calls. This 
consolidation means that it may be possible for each office to 
use a single PRI span, rather than two T1 spans. 
Toronto Office
New York  Office
Network #: 2221
    Recd #: 2221
 Internal #: 2221
DID #: 763-2221Network #: 6221
    Recd #: 6221
 Internal #: 6221
DID #:562-6221
Central
OfficeCentral
Office PRIPRI
Public NetworkTie Connection
To r o n t o  o f f i c eNew York office
Network #: 2221
Rec’d #: 2221
Internal #: 2221
DID #: 763-2221Network #: 6221
Rec’d #: 6221
Internal #: 6221
DID #: 763-6221
PRITie connectionPRI
Central 
OfficeCentral 
Office
Public network 
						

							106 / Dialing plans
Modular ICS 6.0 Installer GuideP0992638 03
With PRI call-by-call services, the only limitation is that there 
are no more than 23 calls in progress at any one time.
The dialing plan at each Norstar site is configured to determine 
the call type based on the digits dialed by the user. If a user in 
Toronto wishes to dial a colleague in New York, they dial the 
four-digit private DN (such as 6221). The dialing plan 
recognizes this as a private network DN, and routes the call 
using Tie service with a private numbering plan.
Incoming Tie calls are routed to sets based on the digits 
received by the network, which in this case will be the four-
digit private DN.
If a user in either location wishes to dial an external number, 
they dial 9, followed by the number (such as 9-555-1212). The 
dialing plan recognizes this as a public DN, and routes the call 
using Public service.
Incoming DID calls will be routed to sets based on the trailing 
portion of the digits received by the network. For example, if 
a public network user dials an employee in the Toronto office, 
the network will deliver digits 4167632221. Norstar will route 
the call using the last four digits, 2221.
Norstar Configuration
HeadingParameterSetting 
Toronto:
HardwareCard 1PRI
ProtocolNI-2
Trk/Line DataLine 245Target line
Rec’d #2221
Line AccessDN 2221L245:Ring only
Line pool accessLine pool PRI-A 
						

							Dialing plans / 107
P0992638 03Modular ICS 6. 0 Installer Guide
To New York:
Routing ServiceRoute001
DIalOutNo numbr
UsePool PRI-A
SrvcTypeTie
ServiceID1
DN typePrivate
DestCode6
Normal rte001
Absorb0
To Public Network:
Routing ServiceRoute002
DialOutNo numbr
UsePool PRI-A
DN typePublic
DestCode9
Normal rte002
AbsorbALL
New York:
HardwareCard 1PRI
ProtocolNI-2
Trk/Line DataLine 245Target line
Rec’d #6221
Line AccessDN 6221L245:Ring only
Line pool accessLine pool PRI-A
To Toronto:
Routing ServiceRoute001
DialOutNo numbr
UsePool PRI-A
HeadingParameterSetting  
						

							108 / Dialing plans
Modular ICS 6.0 Installer GuideP0992638 03
PRI dialing plan example for two-way DID
The following list shows the steps involved in configuring a 
dialing plan for two-way DID which uses a Public service. In 
this example the user dials the prefix 8 to place a call over a 
PRI line. 
Note:  Call-by-call is not needed to have two-way DID.
in Hardware programming, configure the DTI card (PRI) 
to use a Public protocol
for incoming calls you need to program target lines to 
match the DID digit that is being received on the PRI 
interface
set Dial Out to None
select PRI-A as the line pool
SrvcTypeTie
ServiceID1
DN typePrivate
DestCode2
Normal rte001
Absorb0
To Public Network:
Routing ServiceRoute002
DialOutNo numbr
UsePool PRI-A
DN typePublic
DestCode9
Normal rte002
AbsorbALL
HeadingParameterSetting  
						

							Dialing plans / 109
P0992638 03Modular ICS 6. 0 Installer Guide
set SrvcType to Public
in Services programming access Routing Service to 
enter a Destination Code (8 in this example)
set the Absorb Length to All
the telephone that you are dialing out from must have 
access to the PRI Pool (programmed in Terminals/Sets)
define rec’d digits for target lines
define limits for incoming and outgoing public calls. Refer 
to Programming Call by Call Limits on page 437
Static DID and two-way DID
When configuring static DID with two-way service, the 
channels programmed as DID at the CO must be the lowest 
B-channels on the PRI. On your Norstar system, the BchanSeq 
mode must be set to descending. In this configuration, all 
calls on the PRI must be Public service.
For example, channels 1 to 4 are configured as DID at the CO. 
The CO uses ascending mode for B-channel selection, and the 
ICS uses descending mode. 
						

							110 / Private networking using PRI SL-1
Modular ICS 6.0 Installer GuideP0992638 03
Private networking using PRI SL-1
You can use PRI SL-1 lines to tandem a number of Norstar 
units into a private network. This creates a Private Network 
Tandem Calling (PNTC) configuration. Refer to Private 
Network Tandem calling on page 112.
You can also use PRI SL-1 lines to link one or more Norstar 
systems to a Meridian 1 system, or to create a network that 
includes one or more Business Communications Manager 
systems. This creates an Advanced Private Network (APN) 
where the MCDN protocol can be used to provide network 
control features that allow network calls to be delivered and 
transferred with optimum efficiency.  If you also use a central 
voice mail system or central Auto Attendant system, MCDN 
provides system-wide Auto Attendant features and line 
redirection. Refer to Advanced Private Networking on page 
121.
SL-1 networking features
common dialing plan using a Uniform Dialing Plan 
(UDP), or a Coordinated Dialing Plan (CDP)
Note: If Norstar voice mail or Auto Attendant is used as 
the centralized voice mail system, CDP must be used for 
the network.
PRI networks can be used for voice, data, and video calls
no usage costs when placing remote calls over private 
networks
Tip - For Modular ICS 6.0 you require both a  PRI software 
key and an MCDN software key to perfor m SL-1 networking.
All Norstar systems in the network also must be running 
MICS 6.0 or MICS-XC 6.0 or greater software.