Panasonic KX-TDA100 Features Manual page 193

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
Calls for PBX-1
Calls for PBX-2
Example Network 3
Three PBXs connected by three TIE lines.
Each PBX is connected to two TIE lines, and must be programmed to send calls to each PBX via the
preferred TIE line, however, if the TIE line directly connecting two PBXs (PBX-1 and 2, for example) is
busy, calls between these PBXs can be routed circularly through other PBXs (PBX-1 → PBX-3 → PBX-
2).
PBX-1
Calls for PBX-2
Calls for PBX-1
Calls
for PBX-3
Calls
for PBX-1
PBX-2
Calls for PBX-3
PBX-3
PBX-2
Calls for PBX-3
Calls for
PBX-2
PBX-3
1.27 Networking Features
Feature Guide 193