Panasonic KX-TD500 User Manual page 41

1.1
BLF on DSS Button
The Busy Lamp Field (BLF) indicator button is red when the corresponding extension is
busy. This is available for Direct Station Selection (DSS) buttons on DSS consoles and
for flexible CO buttons assigned as DSS buttons on proprietary telephones.
The table below shows the lighting patterns for the corresponding extension.
Off
Red On
Red slow flashing
Configuration
DSS button Corresponding Extension
Log-in
Incoming call/You or another extension is using
the line.
Log-out
DPT Overview
1-27