Avaya MERLIN MAGIX Maintenance And Troubleshooting Manual page 342

System Programming Basics
When you program a telephone with an attached DSS from another extension, all the LEDs on the
DSS turn off, including the bottom two rows, during programming mode.
Figure 2-3. DSS4450 for 4400-Series Telephones
1 LEDs (50)
2
DSS Buttons (50)
3 Page Buttons
4 Message Status Button
5 Reserved Buttons
Direct Station Selector (DSS)
2-6