Issue 2.2
Feature Description and Operation Manual
228
16.1 Busy Lamp Field (BLF) Manager
Description
When systems are networked, the status of stations in one system can be displayed at stations
of other systems in the network. The LED of a [Net DSS] button provides the BLF (idle or
busy) indication for the assigned station. When only two ipLDK-60 systems are networked,
BLF status is provided directly between the two systems with each serving as the others BLF
GateKeeper. When more than two systems are in a network, the LG-Ericsson BLF Manager
application provides the BLF status across the network. BLF Manager is a Windows
®
application that communicates with systems on the network as the BLF Gatekeeper.
Networked systems send regular updates of station status to the BLF Manager. Periodically,
the BLF Manager sends a UDP multi-cast message to all systems on the network. The BLF
GateKeeper can reside in any location that has IP access to all systems in the network to
receive and send both UDP and TCP packets.
Consideration
The BLF Manager GateKeeper is installed as a central function of all ipLDK systems in a
network and must be able to communicate using UDP and TCP over an IP network with
the ipLDK systems.
The ipLDK-60 can provide Net DSS BLF status for all stations.
The BLF Manager provides BLF for stations only, status for CO lines is not provided; CO
BLF is not supported.
The LED of a [Net DSS] button indicates BLF status of busy (LED On), idle (LED Off) or
DND (LED flashing). Ring signals at a station, including recalls, are not registered
across the network and will display as idle.
Each ipLDK system updates the station status to the BLF Manager at intervals of the BLF
status duration.
If the BLF manager does not exist, BLF services can be activated between only two
Systems. In this case, the GateKeeper address is the IP address of the LAN port of the
other system.
Reference
A. Flexible Buttons
B. User Station Programming
Admin Programming
Networking Supplementary Attributes (PGM 321)
Assigns characteristics of the BLF Manager Gate Keeper for a system in the network
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