Press OPTIONS. Press the (large) right arrow key under the display. Press the soft-key by the words, "Contrast Control". Press the soft-keys left/right to heighten/lighten contrast.
The ideal contrast depends on ambient lighting and your own preferences. Thus you will likely want to make this adjustment and not simply accept the factory defaults. :-)
Add Speed Dial numbers
There are two SP (speed dial) directories:
The top-level screen shows the "institutional" speed dial directory which everyone shares and which we have no direct control over. Working with CIT, we're trying to get an "Audix" speed dial on that screen to actually work.
The second SP directory if your own directory.
To get to your own SP directory, from that top-level screen, press the soft-key underneath the contraction, "SpDial".
You will then see options to "Add", "Edit", and "Delete" SP's. To "Add", press the appropriate soft-key and follow the prompts.
Zero out number of missed calls
The top-level screens shows the number of missed calls in the upper-left corner. To zero out this number, press the soft-key under "Log". Press the soft-key under "Missed" to see the missed calls. Press the soft-key under "DeleteAll", and you will be prompted to confirm you want to "Delete All Missed Calls". Press the soft-key under "Delete" (at lower, far left) if you do.
Reprogram VoIP phone for a different number
Caution: This deactivates number from any existing headset using that phone number!