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3.1 E&M Features
TIE Line Network – Alternate Routing
Description
When more than two PBXs at different locations are interconnected with a network of TIE
Lines, your KX-TD500 works as an intermediate switching office to other PBXs in the network
by relaying TIE calls from one PBX to another. A problem of telephone switching is that
blocking sometimes occurs on the network, and a call cannot be switched as required because
all the lines on a given route are occupied or unavailable. By utilising this relay function,
several alternative routes can be set up beforehand in addition to the primary-route. This
permits TIE calls to be routed from "A to B" or "A through C to B" and so on. If the primary-
route is poor because of equipment failure or congestion, KX-TD500 bypasses it and selects
the secondary-route.On reception of a TIE call, KX-TD500 analyses it to determine the
destination to which the call must be sent or the route by which the calls will be sent, and then
transmit it. Alternate Routing makes a TIE Line network more flexible in adapting to peaks of
traffic and it provides a variety of different routing plans.
A Network of TIE Lines
Ext. 100
Call Flow
1.
Ext.100 dials "77+952+200".
2.
When "952" is found in the table, TG10 (Hunt Sequence 01 for "952") is selected
automatically.
• If TG10 is not available, TG11(Hunt Sequence 02) will be selected. In this case, the call
is sent to PBX-2 via PBX-3 and -4. The treatment of the call is decided by Routing Table
of PBX-3 and then PBX-4.
3.
The call is sent to PBX-2.
Programming example:
To realise the call flow mentioned above, the following System Programming is required at
PBX-1, -3, and -4 respectively.
360
PBX-1
PBX Code: 951
TG 10
TG 11
TG 11
TG 12
PBX Code: 953
PBX-3
: Primary-route
: Secondary-route
PBX-2
PBX Code: 952
TG 10
TG 13
Ext. 200
TG 13
TG 12
PBX Code: 954
PBX-4
Features Guide
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