Panasonic KX-TDA100 Features Manual page 255

Explanation:
An outside caller dials the DID number "123-4567". The call reaches the
destination (extension 1011 of PBX-1), and the call is forwarded, transferred, or
intercepted to extension "2011" of PBX-2 through the TIE line.
3.2 TIE-to-Trunk Access
The PBX sends TIE line calls to the trunks of another PBX through the TIE lines.
a) Trunk Call through Other PBXs—by Making a TIE Line Call Method
[Example]
<Extension Number Method (Access without PBX Code)>
PBX-1
Interface
Extn. 1011
Dials "802-9-01-23-4567".
Explanation:
1. Extension 1011 of PBX-1 dials the Trunk Group Access number of PBX-1 "8",
trunk group number "02" (TRG2), Idle Line Access number of PBX-2 "9", and
telephone number "01-23-4567".
2. PBX-1 sends the call to PBX-2 through the trunk group (TRG) 2 (TIE line).
3. PBX-2 sends the call to the outside party "01-23-4567".
TIE Line Network
9-01-23-4567
TIE Line
Interface
TRG 2
1.28 Networking Features
Telephone Company
Trunk
01-23-4567
PBX-2
Extn. 2011
Trunk
Outside Party
(01-23-4567)
Feature Guide 255