Panasonic KX-TDA50, Features Manual

Page: 197 / 668

1.25 Networking Features
Feature Guide 197
1.
Programming for Extension Number Method (Access without PBX Code)
Each PBX in the private network will refer to some or all of following tables when making and receiving
calls via TIE line using Extension Number Method (Access without PBX Code).
TIE Line Routing and Modification Table
This table is used when a PBX makes a call to another PBX, or passes a received call on to another
PBX. It contains leading numbers as well as routing instructions for each leading number; it controls
which calls are sent on which TIE lines.
Use this table to store the first few digits (leading digits) of the extension numbers used by other PBXs
on the private network, the lines which can be used when sending calls to each PBX, and, if necessary,
a method to modify dialed numbers before sending them down the TIE line.
When a PBX is about to send a number down a TIE line, it checks the number and finds the
preprogrammed leading digits of that number in this table. It then checks the highest-priority (most
preferred) CO line group assigned to that leading number. When it finds a line within the highest-priority
CO line group that is available, it modifies the number as if programmed to do so. After modification,
the number is sent down the line.
Incoming Number Modification Table
This table is referred to when a call is received on a TIE line.
When a PBX receives a call on a TIE line, it searches the Incoming Number Modification Table for
instructions on how to modify the received telephone number depending on which CO line the call was
received.
After modifying the number, the PBX will check to see if this modified number is stored in its Extension
Numbering Plan or Other PBX Extension list (see "Flexible Numbering" below). If the PBX cannot
handle the call itself (when a call is meant for an extension of a different PBX, for example), it refers to
the TIE Line Routing and Modification Table in order to send the call down the TIE line.
Flexible Numbering
Flexible Numbering contains several numbering plans which will be referred to after an extension user
dials a number, or after an incoming TIE line call is modified by the Incoming Number Modification
Table.
If the dialed number or modified number is found in the Extension Numbering Plan or Feature
Numbering Plan, the PBX will send the call to one of its own extensions or access the appropriate
feature, respectively.
If the modified number is found in the Other PBX Extension list, the PBX will check the TIE Line Routing
and Modification Table for instructions on how to send the call down the TIE line.