Inter-Tel AXXESS Manual page 613

I. TRUNK GROUPS
10.109Each trunk is assigned to one of 104 possible trunk groups (208 in a triple- or quad-
chassis system). Trunk group feature codes and trunk group buttons are used to select a trunk
in one of the programmed trunk groups. Each trunk must be assigned to a trunk group. For
example, all local trunks could be in one group, while another group could contain WATS
trunks that are used for long distance calling. Unused trunks can be placed in a single trunk
group that is labeled "unused."
10.110All trunks in a trunk group must reside on the same node as the trunk group.
10.111The trunk group is programmed to process outgoing calls in linear or distributed order:
•
Linear Trunk Group: Requests for an outgoing trunk are always processed beginning
with the highest numbered trunk circuit on the list and move through the list until an
available trunk is found.
•
Distributed Trunk Group: The first request is processed beginning with the highest
numbered trunk circuit on the list. The next request begins with the second highest
numbered trunk, and each subsequent request begins one trunk lower on the list. When
the end of the list is reached, requests begin again with the highest numbered trunk on
the list.
10.112The camp-on feature can be enabled or disabled for each trunk group. If the camp-on
feature is disabled, callers hear continuous busy signals when all trunks in the trunk group are
in use or unavailable. If it is enabled, callers can camp on and wait for an available trunk. See
page 6-237
J. NODES AND NODE TRUNK GROUPS
10.113Node trunk groups: Are made up of PRI circuits that are programmed for private net-
work use. When a PRI-equipped card is programmed for networking (Private Networking
switch type), the system automatically creates a node trunk group. (All B-Channels residing on
the same T1/PRI or E1/PRI card are in the same node trunk group.)
10.114Node programming: Contains a list of node trunk groups used to access another node.
For each node in the network, you must define the routes to every other node. For example, in
a network with four nodes, you would define three routes for each node (one to each of the
other three nodes). For details, see
Appendix A —
10.115The nodes are programmed to select their node trunk groups in linear or distributed
order:
•
Linear: The node first attempts to route through the first node trunk group listed in the
node. If the node is unable to route through that node trunk group, it attempts to route
through the second node trunk group listed in the route. The node continues to attempt
to route through subsequent node trunk groups in the list until it successfully routes or
exhausts all node trunk groups in the list.
•
Distributed: The node shifts the first node trunk group it attempts to use. For example,
if the node routed the previous call or communication through the first node trunk
group listed, the node routes the second call or communication through the second node
trunk group listed.
10.116To prevent circular or excessive routes, the system limits the number of "hops." A call
or communication can take up to 10 hops to other nodes. (However, 2-3 hops maximum is rec-
ommended.)
Trunk Groups
®
INTER-TEL
for programming information.
page 6-243
Networking.
®
AXXESS MANUAL VERSION 11.0 – May 2008
in PROGRAMMING and the information in
System Features
Page 5-87
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