Yealink SIP VP-T49G User Manual page 205

Basic Phone Features
If phone B has anonymous call feature enabled and places a call to your phone, the call
will be rejected, and the touch screen of the phone B will display the following:
You can capture the screenshots during a video call via phone user interface. Before
capturing the screenshot, ensure that the USB flash drive has been connected to your
phone. The USB flash drive can store the screenshots.
The screenshots are saved in *.JPG format and include a date/time stamp and the other
party's number/IP address/name (or the first person's number/IP address/name you
called), for example, 20150731-1630-Mishoel.JPG was created on July 31, 2015, at 16:30
and you have a call with Mishoel.
Note
If the call is audio-only, you cannot capture the screenshot.
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