Panasonic KX-TDA50 Features Manual page 183

3.
Routing Calls via TIE Lines
Normally to make a telephone call, a person dials a number and the call is connected. What happens
between the dialing of the number and the ringing on the other end is usually never considered,
because telephone companies handle all the routing for us.
To make or receive calls using TIE lines however, the PBXs must be programmed so they will know
how to handle those calls as they are received and sent. In situations where only two PBXs connected
by one TIE line make up the private network, this programming is straightforward. In situations where
multiple PBXs are connected by several TIE lines however, programming is more complex.
No matter what kind of private network you use, careful programming will allow PBX users to make calls
easily and also route calls in a way that is most cost-effective or efficient for your company or
organization.
[Examples of Private Networks]
Example Network 1
Two PBXs connected by one TIE line.
PBX-1
Calls for PBX-2
Calls for PBX-1
Example Network 2
Three PBXs connected by two TIE lines.
PBX-2 is connected to both TIE lines. This PBX links the other two PBXs, and passes calls from one
PBX to the other.
PBX-2 must be programmed to send calls to PBX-1 via one TIE line, and calls to PBX-3 via another
TIE line. This programming will also allow PBX-2 to receive and send calls made between PBX-1 and
PBX-3.
Calls for PBX-2
PBX-1
Calls for PBX-3
Calls for PBX-1
PBX-2
PBX-2
Calls for PBX-3
Calls for PBX-1
Calls for PBX-2
PBX-3
1.25 Networking Features
Feature Guide 183