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Understanding the Pooled Lines Network Feature

Detailing the Line Pooling Feature

The network line pooling feature is a variation of the traditional line group access feature that is available with

stand-alone communications systems. With line pooling, a caller from one node can make outbound calls over

lines connected to other nodes in the network. The line pooling feature operates with the Automatic Route

Selection (ARS) feature to make line selections for callers’ outbound calls. ARS may route calls in any of the

following ways:

•

from a node and terminate them at the hub,

•

from one node through the hub to another node,

•

internally through one node without passing them through the hub.

The system allows a maximum of two passes, or hops, through the hub. Some examples of this are listed below:

•

A call that originates at node 1, passes through the hub, routes to node 2, passes through node 2 and back to

the hub, passes through the hub again, and terminates at node 3.

•

A call that originates from a node, passes through the hub, and returns to the originating node also. (This

situation exists when ARS is centralized at the hub.)

Calls that route through the network have their digits translated and/or modified at the originating node, again at

the hub, and again at the terminating node before they route out of the network to the service provider.

The Station Message Detail Accounting (SMDA) feature at the originating and terminating nodes records the

intercom number of the call originating station and marks the call with the alphabetic letters NT to denote the call

as a network call. In this report, both the ALL and LINE listings show the intercom number of remote stations.

The station class of service that sets the parameters for a calling station determines the level of call access and call

restriction at that station’s node. The local node applies toll restriction to calls that originate at that node. These

toll restriction limitations are based upon the programmed class of service for that station. When a call passes

through the hub or other nodes, each location imposes the same toll restriction limitations that the originating

node imposed on the call.

The network defaults to a dial-9, for line pool access, but any other digit will function equally well as an ARS

access digit when programmed to do so. The line pooling feature also supports line group selection buttons for

local line groups on individual node stations.

16 – Features

IMI89–280 Installing and Using System-to-System Networking

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Comdial and FXT Manual de usuario Pagina 18