Nortel Modular Ics 6.1 Installer Guide

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Call-by-Call Services Example
This example highlights the use of PRI Call-by-Call Services.
Call-by-Call routing
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...

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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...

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dialing plan recognizes this as a public DN, and routes the call 
using Public service.
Incoming DID calls will be routed to telephones 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
Toronto:
HardwareCard 1PRI...

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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
SrvcTypeTie
ServiceID1
DN typePrivate
DestCode2
Normal rte001
Absorb0 

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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...

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•define rec’d digits for target lines
• define limits for incoming and outgoing public calls. Refer 
to Programming Call by Call Limits on page 461
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...

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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 119.
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...

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• caller information appears on both the caller telephone and 
the called telephone, regardless of the number of 
redirections
• PSTN lines connected to one of the nodes in a network can 
provide local public service, at local rates, to all nodes in 
the network, regardless of location
Features specific to Advanced Private Network
• centralized voice mail provides call waiting indications on 
the receiving telephone
•...

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• NCRI count allows a call to be forwarded in the network 
up to five times before the system releases the call as 
undelivered. However if TAT or TRO occur, the counter 
gets reset, as well. This counter is hard-coded.
Private Network Tandem calling
Tandem networking is a chained network established between 
two or more MICS systems. All the systems are connected via 
PRI SL-1 lines. 
In the network example shown below,...

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All nodes have unique three-digit private identification codes 
as well as public network codes. Routes and destination tables 
are configured on all systems to correctly route dialed numbers 
to other nodes. DNs do not necessarily have to be unique, but 
they must be the same length on all systems.
Calls originating from the public network
Received Destination Description
Node A Node A User in Calgary dials 761-xxxx...