Nortel Compact Ics 6.0 Installer Guide

P0992669 03Compact ICS 6.0 Installer Guide
Networking with Norstar
In addition to public network connections, Norstar Compact ICS can be 
integrated into an existing private network or to other Norstar systems to 
form a corporate telecommunications network.
The big picture
Norstar uses enhanced trunking to join other Norstar or customer 
equipment in a private network. Authorized users can also access central 
office lines and Norstar features from outside their Norstar system.
Callers using the Norstar...

42 / Trunks and target lines
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Trunks and target lines
Trunks are external lines that provide the physical connection between a 
Norstar system and other systems in a private or public network. Norstar 
Compact ICS supports two different types of trunks:
Loop start trunks handle incoming and outgoing calls between Norstar 
and the public network. They are numbered 001-004 and 031-034.
BRI trunks handle incoming and outgoing calls between Norstar and 
an ISDN...

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When a call comes in on an auto-answer loop start trunk that is not 
configured to answer with DISA, the caller hears system dial tone. They 
can then enter:
a target line number
a DISA DN, which is the number that will prompt for a COS password
a line pool access code
a remote feature code from a DTMF telephone
To place an outgoing call, a loop start line can be selected by pressing a line 
button on the telephone, dialing a...

44 / Trunks and target lines
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BRI trunks
BRI trunks give you incoming and outgoing access to an ISDN network. 
Like loop start trunks, they can be configured as manual-answer or auto-
answer. See the Loop start trunks information that starts on page 42 for 
information on setting the answer mode.
BRI trunks provide a fast, accurate and reliable means of sending and 
receiving data, images, text and voice information. Using BRI lines allows 
for faster...

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Remote system access
The remote access feature allows callers elsewhere on the public network 
to access a Norstar system directly without going through an attendant. 
Once in the system, the remote user can use some of the system’s 
resources. The remote access must be enabled in programming before 
callers can use it.
Norstar Compact ICS systems support remote system access on auto-
answer loop start trunks and can require the remote...

46 / Networking features
Compact ICS 6.0 Installer GuideP0992669 03
Networking features
Security
Programming provides several ways of protecting your Norstar system 
from unauthorized access or use.
Class of Service
Class of Service (COS) refers to the capabilities that Norstar provides to 
users who access the system from the public or a private network. 
The COS includes:
filters that restrict dialing on the line
an access package, which defines the set of line pools that may be 
accessed and whether...

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To restrict dialing within the system, you can apply restriction 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 Restrictions service for times 
when the system is operating according to a schedule. Refer to the 
description in Services on page 168 for more details.
Calling out...

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Calling in
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 Restrn filters on page 
164 in this guide.
Direct inward system access (DISA)
To control access from the public network, configure auto-answer trunks 
to answer with DISA. Remote callers...

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Transparent dialing plan
The Norstar system has a routing feature that allows you to set up a 
transparent or coordinated dialing plan with other systems in the public 
network. The goal is to have a network-wide dialing plan where all 
telephone numbers are unique and of a uniform length.
Dialing plans are typically used with a network of systems with a three to 
seven digit dialing access between them.
Any programming for routing...

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Note that, in this case, only the Normal schedule is being used.
Destination code numbering in a network
Because the system checks the initial digits of a call against the routing 
tables, each type of internal or external call must begin with a unique 
pattern of digits. The following table gives a sample plan for how initial 
digits are assigned in a network of systems with three-digit intercom 
numbers.
In the table, 4 is used as the...