IP LDK-20 Programming Manual System Feature
213
2.16.18 BLF(Busy Lamp Field) Presentation
Description
A station of networking system is able to program a busy lamp appearance of the station status of
other networking system. The Busy Lamp Field (BLF) button can also be used to make a net call the
networking station.
To use BLF service, the BLF manager software, PC application, must be installed at PC. The term of
the GATE KEEPER is the PC server, that is installed the BLF manager software and executing it.
The figure 2.16.18 describes the BLF operation on the networking configuration with the gate keeper.
In the figure, there are four IP LDK networking systems. Among them, the station 4100, 5111, 6210
have the BFL button of the station 1100. The networking system of station 1100 is transmit the status
of the station 1100 to the gate keeper periodically. And the gate keeper is also multi-cast the status of
station 1100 to other networking system periodically. Then the BLF button of station 4100, 5111, 6210
is updating the status of station 1100 to its BLF LED.
Figure 2.16.18 The BLF operation on the networking configuration with the gate keeper.
Operation
1. The BLF manager software periodically receives the status of station from whole system.
notice)
UDP port will be used to send the status information, and TCP port will be used to send
other information.
2. The BLF manager software sends the broadcast message to whole system when the status is
changed.
4100 5111 6210
STN 1100
STN 4100
STN 5111
STN 6210
1100 5111 6210
1100 4100 6210
1100 4100 5111
Gate Keeper
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