About the Expansion Module for IP Phone 1100 Series9Adjusting the displayThe Expansion Module is equipped with a graphical, pixel-based,grayscale LCD display area beside the 18 line/feature keys (see Figure 1on page 8). Each of the 18 physical keys on the Expansion Module has a10-character display label. This label is set automatically, however, theuser can edit the label using the controls on the IP Phone.To adjust the display and contrast on the Expansion Module, use theContrast Adjustment option in the Telephone Options menu on theIP Phone. Any contrast changes you make on the IP Phone affect theExpansion Module. The Expansion Module and IP Phone do not haveseparate contrast adjustments.The type of power supply to the phone controls what is functional on theExpansion Module for IP Phone 1100 Series. The Expansion Module’sbacklight can only light when the local 48V power supply is present. Onthe other hand, either local 48V power supply or Power over Ethernet(PoE) to the phone will power all of the Expansion Module’s otherfunctionality.For more information, see the section “Adjusting the screen displaycontrast” in your IP Phone User Guide.