Home > Nortel > Communications System > Nortel Modular Ics 6.1 Installer Guide

Nortel Modular Ics 6.1 Installer Guide

Here you can view all the pages of manual Nortel Modular Ics 6.1 Installer Guide. The Nortel manuals for Communications System are available online for free. You can easily download all the documents as PDF.

Page 51

Welcome to ISDN / 51
P0603534  02Modular ICS 6.1 Installer Guide
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...

Page 52

52 / Welcome to ISDN
Modular ICS 6.1 Installer GuideP0603534  02
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...

Page 53

Welcome to ISDN / 53
P0603534  02Modular ICS 6.1 Installer Guide
• 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...

Page 54

54 / Welcome to ISDN
Modular ICS 6.1 Installer GuideP0603534  02
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...

Page 55

Welcome to ISDN / 55
P0603534  02Modular ICS 6.1 Installer Guide
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...

Page 56

56 / Welcome to ISDN
Modular ICS 6.1 Installer GuideP0603534  02
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...

Page 57

Welcome to ISDN / 57
P0603534  02Modular ICS 6.1 Installer Guide
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.
In
s
p
e
c
t F
O
R
W
A
R
D
 C
a
lle
rsInspect FORWARD CallersM
X
PMXP
S
S
In
s
p
e
c
t F
O
R
W
A
R
D
 C
a
lle
rsInspect FORWARD CallersM
X
PMXP
In
s
p
e
c
t 
F
O
R
W
A
R...

Page 58

58 / Welcome to ISDN
Modular ICS 6.1 Installer GuideP0603534  02
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...

Page 59

Welcome to ISDN / 59
P0603534  02Modular ICS 6.1 Installer Guide
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...

Page 60

60 / Welcome to ISDN
Modular ICS 6.1 Installer GuideP0603534  02
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...
Start reading Nortel Modular Ics 6.1 Installer Guide

Related Manuals for Nortel Modular Ics 6.1 Installer Guide

All Nortel manuals