Nortel Networks NN43001-563 - Manual (Page 320)

320 Provisioning IP Trunk 3.01 (and later) in TM 3.1
Another concern when using QoS monitoring is the effect of the additional
traffic generated by QoS messages being sent between nodes. If all nodes
have QoS enabled, the effect of adding one additional node nearly doubles
the number of QoS messages being sent.
For example:
A two-node network will generate 2 QoS messages.
A three-node network will generate 6 QoS messages.
A four-node network will generate 12 QoS messages.
A five-node network will generate 20 QoS messages.
The formula that can be used is:
Number of QoS messages sent = x 2 – x
where x = number of nodes using QoS
QoS monitoring might need to be turned off for IP Trunk 3.01 (and later)
nodes using low bandwidth connection. For more information on how to
properly engineer the network, refer
"ITG engineering guidelines" (page 87) .
Dialing plan types
There are six kinds of dialing plans supported with IP Trunk 3.01 (and later):
1. NPA – North American Area codes (the 613 in 1-613-555-1212). A
maximum of 7 digits are supported; for example, 1-613-555.
2. NXX – North American Exchange, the first three numbers of a local
number; for example, the 555 in 1-613-555-1212).
3. LOC – Location Code. A code for a particular location. Each LOC must
be leftwise-unique. For example, 011 and 0112 are not unique, but
011 and 012 are unique. The maximum number of digits supported is
7 digits.
4. SPN – Special Cases. This is for routing international calls or special
cases; for example, 011923xxxx or 911. The maximum number of digits
supported is 19 digits.
5. DSC – Distance Steering Code, part of a Coordinated Dialing Plan
(CDP) network. In a CDP network, all numbers must be leftwise-unique
as all the systems in that network are viewed by the end user as part
of one system.
For example, Network ABC has half of the users on a Meridian 1 system
and half on a CS 1000E system. The Meridian 1’s extensions start with
5; for example, 5xxxx. The Meridian 1 routes calls with Dialed Numbers
that start with 7 (for example, 7xxxx) through the IP Trunk card to the
CS 1000E system.
Nortel Communication Server 1000
IP Trunk Fundamentals
NN43001-563 01.01 Standard
Release 5.0 30 May 2007
Copyright © 2007, Nortel Networks
.