Nortel Modular Ics 6.0 Installer Guide

							P0992638 03Modular ICS 6. 0 Installer Guide
Remote system access
The remote access feature allows callers elsewhere on the 
private or the public network to access a Norstar system by 
dialing directly without going through an attendant. Once in 
the system, the remote user can use some of the system 
resources. The remote access must be enabled in programming 
before callers can use it.
Norstar systems support remote system access on the 
following trunk types which may require the remote caller to 
enter a COS password for direct inward system access (DISA):
auto-answer loop start trunks
auto-answer E&M trunks
DID trunks, by means of the DISA DN
PRI trunks, by means of the DISA DN
The system resources, such as dialing capabilities, line pool 
access and feature access, that a remote user may access 
depends on the Class of Service (COS) assigned to the user. 
See Class of Service on page 85, COS pswds on page 382 and 
the Modular ICS 6.0 System Coordinator Guide for more 
details.
Use system features during a remote call
To use features on a Norstar system during a remote call-in, 
press ¥, followed by the feature code. Even if you are calling 
from another Norstar system, press ¥ instead of ². 
						

							82 / Remote system access
Modular ICS 6.0 Installer GuideP0992638 03
Remote access on loop start and E&M trunks
Loop start trunks provide remote access to Norstar from the 
public network. E&M trunks provide remote access from a 
private network. Each must be configured to be auto-answer to 
provide remote system access. 
A loop start trunk must have disconnect supervision if it is to 
operate in auto-answer mode. E&M trunks always operate in 
disconnect supervised mode.
When a caller dials into the system on a line that has auto-
answer, the system answers with system dial tone and no COS 
password is required. In this case, control over the system 
capabilities available to the caller is provided only by the 
restriction filters assigned to the line.
When a caller dials in on a line that has auto-answer with 
DISA, the system answers with stuttered dial tone. This is the 
prompt to enter a COS password. The password used by the 
caller determines which system capabilities are available to 
the caller.
Remote access on a private network
Nodes on the private network deliver the last dialed digits to 
the destination Norstar node, for interpretation by the 
destination Norstar node. The destination Norstar node either 
matches the digits to a target line or interprets the digits as a 
remote feature request. The call is either routed to the specified 
target line, or the remote feature is activated.
By default, E&M trunks are set to answer with DISA. For 
auto-answer E&M trunks connected to a private network, 
change the default so that the trunks are not answered with 
DISA. If an auto-answer E&M trunk is configured to answer 
with DISA, the system tries to interpret any received digits as 
a COS password. 
						

							Remote system access / 83
P0992638 03Modular ICS 6. 0 Installer Guide
The DISA DN and the Auto DN allow auto-answer private 
network and DID calls, in the same way that calls on 
auto-answer loop start and auto-answer E&M trunks can be 
answered, with or without DISA. These DNs are described in 
System prgming under Access codes.
Remote access on Direct Inward Dial (DID) trunks
Remote system access on DID trunks is similar to that of E&M 
trunks connected to a private network.
The main differences are:
a remote caller is on the public network dialing standard 
local or long-distance telephone numbers
the digits received are delivered by the central office
DISA cannot be administered to a DID trunk
As with a private network, the di aled digits may be 
programmed to match those of a specific target line DN, the 
DISA DN or the Auto DN.
Remote access on PRI trunks
Remote system access on PRI trunks is similar to that of E&M 
trunks connected to a private network. 
The main differences are:
a remote caller is on the public network dialing standard 
local or long-distance telephone numbers
the digits received are delivered by the central office
answer with DISA cannot be administered to a PRI trunk 
since PRI trunks are set to autoanswer.
As with a private network, the dialed digits may be 
programmed to match those of a specific target line DN, the 
DISA DN, or the Auto DN. 
						

							84 / Remote system access
Modular ICS 6.0 Installer GuideP0992638 03 
						

							P0992638 03Modular ICS 6. 0 Installer Guide
Controlling system access
Modular ICS programming provides several ways of 
protecting your Norstar system from unauthorized access or 
use. These features are used in combination to provide control 
both to users and to lines.
Class of Service
Class of Service (COS) refers to the capabilities that Norstar 
provides to users who access the system from the public or 
private network. A password defines which set of capabilities 
the user is to have access to.
The COS includes:
filters that restrict dialing on the line
an access package defines the set of line pools that may be 
accessed and whether or not the user has access to the 
paging feature
The COS that is applied to an incoming remote access call is 
determined by:
the filters that you apply to the incoming trunk
the Class of Service password that the caller used to gain 
access to the Norstar system
In cases where DISA is not automatically applied to incoming 
calls, the remote caller can change the COS by dialing the 
DISA DN and entering a COS password.
To program COS passwords, see Passwords on page 382 and 
the Modular ICS 6.0 System Coordinator Guide. 
						

							86 / Controlling system access
Modular ICS 6.0 Installer GuideP0992638 03
Restriction filters
Restriction filters can be used to restrict the numbers that may 
be dialed on any external line within your Norstar system. Up 
to 100 restriction filters can be created for the system.
A restriction filter consists of up to 48 restrictions with 
associated overrides.
To restrict dialing within the system, you can apply filters to:
outgoing external lines (as line restrictions)
telephones (as set restrictions)
external lines on specific telephones (as  line/set 
restrictions)
Restriction filters can also be specified in Restriction 
Service, for times when the system is operating according to 
a Schedule. See Services on page 353 for more details.
Dialed digits must pass both the line restrictions and the set 
restrictions. The line/set restriction overrides the line 
restriction and set restriction. Refer to the following diagrams. 
						

							Controlling system access / 87
P0992638 03Modular ICS 6. 0 Installer Guide
Line restrictions
In the previous diagram, a caller using line 1 could only dial 
long-distance numbers to area codes 212 and 718. A caller 
using line 3 could not dial any long-distance numbers. A caller 
using line 5 could dial long-distance numbers to area codes 
212, 718, and 415.
Line/Set
restriction Set restriction
line 1
line 3
line 5
Line restriction
line 1
line 3
line 5
no long
distance
except
area codes
212, 718, 415no long
distance
except
area codes
212, 718no long
distance
except area
codes 212
718, 214, 713
no long
distance
no long
distance
Line restriction
Line/set restriction line 1line 1
line 3
line 3
line 5
line 5
no long 
distance 
no long 
distance 
no long 
distance except 
area codes 
212, 718, 415no long 
distance 
except area 
codes 212, 
718no long 
distance except 
area codes 
212, 718, 214, 
713
Set restriction 
						

							88 / Controlling system access
Modular ICS 6.0 Installer GuideP0992638 03
Remote caller restrictions
In this case, dialed digits must pass both the remote restriction 
and the line restriction. A remote caller can override these 
filters by dialing the DISA DN and entering a COS password. 
For restriction filter programming instructions, see 
Restrictions on page 322 and the Modular ICS 6.0 System 
Coordinator Guide.
Tips - Set restrictions have no effect on numbers dialed on 
an E&M trunk.
To restrict dialing outside the system, once a caller gains 
remote access, you can apply restriction filters to incoming 
external lines, as remote restrictions.
Remote 
callerRemote restriction
no long 
distance 
except area 
code 212, 
718no long 
distance 
except area 
code 212, 
718, 416
no long 
distance 
except area 
code 212, 
718, 416 Line pool 
access 
code 81Line 1
Line 3 Line filter 
						

							Controlling system access / 89
P0992638 03Modular ICS 6. 0 Installer Guide
Direct inward system access (DISA)
To control access from the public or private network, you can 
configure auto-answer trunks to answer with DISA. Remote 
callers hear a stuttered dial tone and must then enter a COS 
password. The password they enter determines what access 
they are allowed in the system.
Auto-answer loop start and E&M trunks are configured to 
answer with DISA by default. For DISA programming 
instructions, see Ans with DISA on page 342. 
In addition to public network connections, Norstar Modular 
ICS can be integrated into an existing private network, or to 
other Norstar or Meridian 1 systems to form a corporate 
telecommunications network.
Tips - You must have one E&M/DISA Trunk Cartridge to 
provide DTMF receivers for every two auto-answer loop start 
trunks on Loop Start or CI Trunk Cartridges.
DID trunks cannot be configured to answer with DISA. If you 
want incoming DID calls to be answered with DISA, configure 
the system with a DISA DN. Incoming DID calls that map onto 
the DISA DN are then routed to a line that has DISA. 
						

							90 / Controlling system access
Modular ICS 6.0 Installer GuideP0992638 03