Panasonic KX-TD500 System Reference Manual page 332

Routing Procedure 1: Routing Table
Provides for the routing of calls over the Tie Line Network.
Up to 36 routing patterns can be programmed in this table.
This table is referenced by the system to identify the trunk route, when an
extension user made a tie call by dialing the feature number for "TIE Trunk
Access" or Other PBX extension number. A routing pattern appropriate for
each call is decided by the first three digits (except tie trunk access code) of
the dialed number.
• Routing Table Override
If a tie call is made by pressing a CO key, this table is not referenced by the
system and the call is routed over the specified tie trunk directly.
(Programming Example)
A Network of Tie Lines
PBX-1
Tie Line
TG10
PBX Code 950
Ext. 100
Tie Line Routing Table (1/3)
No. Code Delete
Digit
01 951 0
02
:
When "7 (Tie Trunk Access Code)+951+100" is dialed by an extension user, the
routing pattern for this call is decided by "951".
Then the call is routed over TG10 (Trunk Group 10 whose type is "TIE").
3-F-72
PBX-2
TG10
PBX Code 951
Ext. 100
Insert Trunk Group Hunt Sequence
Dial
01 02
10
03 04 05