320 Provisioning IP Trunk3.01 (and later) in TM 3.1
The QoS feature only works if the far end is an IP Trunk3.01 (and later) or
an ITG Trunk2.x node. Additionally,there must be a fallback route for the IP
Trunk3.01 (and later) node to use to reach the far end, such as a PRI trunk.
Otherwise, if the QoS level between the two nodes fallsbelow the threshold,
calls can no longer be made. If the far end is an IP Peer endpoint and QoS
is turned on, calls cannot be made to that node.
IP Peer Networking does not support the QoS messages sent from the IP
Trunk3.01 (and later) node. If QoS is turned on, the IP Trunk 3.01 (and
later) node interprets this as a node that is unreachable.
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 = x2–x
where x = number of nodes using QoS
QoS monitoring might need to be turned off for IP Trunk3.01 (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– Nor th 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.
Nortel Communication Server 1000
IP TrunkFundamentals
NN43001-563 02.01 Standard
Release 5.5 21 December 2007
Copyright© 2007, Nor tel Networks
.