To Receive a TIE Line Call
a. Extension Number Method (Access without PBX Code)
[Example]
PBX-1
PBX-2
Extn. 1011
1
3011
2
3011
PBX-4
Extn. 2011
PBX-3
Extn. 3011
Dials "3011".
3
TIE Line Network
A TIE line call is sent to
PBX-2 from 
PBX-1. If the
number sent from PBX-1
is an extension number of
PBX-2 (e.g., 2011), the
call will be received at
extension "2011". If not,
PBX-2 checks the
number in the TIE Line
Routing and Modified
Table of PBX-2.
If the match is found in
the table, the call will be
modified 
according 
to the
table and send to the
corresponding PBX
(PBX-3).
The number sent from
PBX-2 "3011" is an
extension number of
PBX-3. The call is
received at extension
"3011".
Note
When a TIE line call is sent from one PBX to another, the receiving PBX first modifies the received
number according 
to the assignment for the trunk port: the number of digits removed, and the number
added, are determined by this assignment. Then the PBX checks whether the completed number is
an existing extension number at that PBX.
342 Feature Guide
1.30.1 TIE Line Service