Yealink EXP40 User Guide
viii
Directory ................................................................................................................................................................... 41
Using the Yealink EXP40 Expansion Module ............................. 44
Using the Line Key ................................................................................................................................................ 44
Adjusting the Contrast ........................................................................................................................................ 45
Adjusting the Backlight ...................................................................................................................................... 46
Using the Busy Lamp Field ................................................................................................................................ 47
Resetting the Yealink EXP40 Expansion Module ...................................................................................... 47
Troubleshooting ........................................................................... 50