Nortel Modular Ics 6.1 Installer Guide

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MCDN trunk features
Systems with MCDN Private Networking connections can 
provide these trunk routing features:
• Trunk Route Optimization (TRO) finds the most direct 
route through the network to send a call between nodes. 
This function occurs during the initial alerting phase of a 
call.
• ISDN Call Connection Limitation: The ICCL feature 
piggybacks on the call initiation request and acts as a check 
at transit PBX points to prevent...

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For services information about dialing plans and PRI, see 
Networking with Norstar on page 99 and Dialing Plan on page 
436.
Refer to the hardware section for Call-by-call routing on page 
485. 
Emergency 911 dialing
Modular ICS 6.1 with the ISDN PRI feature is capable of 
transmitting the telephone number and internal extension 
number of a calling station dialing 911 to the Public Switched 
Telephone Network. 
State and local requirements...

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• The routing table should route 911 to a public line or line 
pool.
• If attendant notification is required, the routing table must 
be set up for all 911 calls to use a dedicated line which has 
an appearance on the attendant console.
Note:  The actual digit string 911 is not hard-coded into the 
system. More than one emergency number can be 
supported 
MCID (Profile 2)
The MCID feature allows you to use ≤°·‡ to have 
call information...

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ISDN hardware
To support connections to an ISDN network and ISDN 
terminal equipment, your Modular ICS must be equipped with 
one or more BRI cards (BRI-U or BRI-ST), a DTI card 
configured for PRI, and a Combination Fiber 6-port Services 
Cartridge or a Services Cartridge.
DTI card configured as PRI
A DTI card configured as PRI provides one T loop. Refer to 
T reference points on page 58 for more information.
In most PRI network...

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Detailed wiring information for BRI and PRI network and 
terminal connections is included in the Installation on page 
219.
BRI-U2 and BRI-U4 card
A BRI-U2 card supports two loops and the BRI-U4 supports 
four loops. Each loop can be individually programmed to 
provide one of the following:
• a U-LT reference point connection for terminal equipment 
(TE) with built-in NT1 functionality (U interface)
• a U-NT reference point connection for...

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U-NT reference points
The U-NT reference point connection provides a point-to-
point digital connection between the ISDN network and the 
ICS.
A U-NT loop provides lines that can be used by all Norstar 
telephones, peripherals and applications, and ISDN TE.
U-NT and U-LT loops can be used in combination to provide 
D-packet service for a point-of-sale terminal adapter (POSTA) 
or other D-packet device. D-packet service is a 16 kbps data...

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S reference point
The S reference point connection provides either a point-to-
point or point-to-multipoint digital connection between 
Norstar and ISDN terminal equipment (TE) that uses an 
S interface.
S loops support up to seven ISDN DNs, which identify TE to 
the ICS.
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T reference points
The T reference point connections provide a point-to-point 
digital connection between the ISDN network and Norstar.
A T loop provides lines that can be shared by all Norstar 
telephones, peripherals and applications, and ISDN TE.
A T loop can be used in combination with an S loop to provide 
D-packet service for a point-of-sale terminal adapter (POSTA) 
or other D-packet device. D-packet service is a 16 kbps data...

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Clock source for ISDN cards
Systems with ISDN interfaces need to synchronize clocking 
with the ISDN network and any connected ISDN terminal 
equipment. Clocking synchronization is supported by either a 
Combination Fiber 6-port Services Cartridge or a Services 
Cartridge. 
The Modular ICS derives timing from the network using 
U-NT and T reference points (loops). Terminal equipment on 
U-LT and S reference points (loops) derive timing from...

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Systems with only U-LT and S loops act as timing masters for 
the attached terminal equipment (TE), and are not 
synchronized to the network. ISDN TE without access to a 
network connection (BRI lines) has limited or no 
functionality.
If your system has both a BRI and a DTI card configured as 
PRI installed, it is recommended that you use PRI as the 
primary clock source, see DTI card configured as a PRI card 
on page 53.
Other ISDN BRI...