
Supplemental Guide – DOC. 8412A
UC-P100-S/UC-P110-S Phones for Skype for Business
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The LCD Screen is Black
If the Power LED Indicator is on and the keypad is usable but the LCD screen is black,
reboot the phone.
Other Issues
Find Basic Phone Information
Tap Status when the phone is idle to check the basic information (e.g., IP address, MAC
address, and firmware version).
Difference Between Enabling and Disabling the RFC2453 Hold Feature
With the RFC2453 Hold feature enabled, SDP media direction attributes (such as
a=sendonly) per RFC 2543 are used in the INVITE message when placing a call on hold.
Packets
With the RFC2453 Hold feature disabled, SDP media connection address c=0.0.0.0 per
RFC 3264 is used in the INVITE message when placing a call on hold.