Panasonic KX-TDA100 Feature Manual page 217

Explanation
1.
TIE Line Routing Flowchart
[Making a TIE Line Call from an Extension]
A TIE line call is made using one of the
following methods:
PBX Code Method:
TIE Line Access Number + PBX Code +
(Extension Number or Other Digits)
Extension Number Method:
Extension Number
an extension number of another PBX or
Does the dialed number begin with a
leading number (PBX code or first few digits of an
extension number) stored in the TIE Line Routing
The TIE Line Routing and Modification Table checks the number and
selects the highest-priority Trunk Group that is available.
The dialed number is modified if a removed number of digits
and/or added number is assigned.
Is the dialed number either
a number beginning with the
TIE Line Access number?
Yes
A
and Modification Table?
Yes
Is a trunk group
available?
Yes
Is there an idle CO line
in the trunk group?
Yes
Routes to other PBX or CO line.
No
Not treated as a call
which uses the TIE line.
No
No
Reorder tone
No
Busy tone
1.13 P
Reorder tone
Feature Manual 217