Polycom 1725-16829-001 ユーザーズマニュアル

User Guide for the Polycom VVX 1500 C Business Media Phone for Cisco Unified Communications Manager (SIP)

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Polycom, Inc.

— Contrast Level—sets the difference in brightness between the light 

and dark areas of near-site video.
Press and drag the slider, or tap the Up or Down soft keys, to set the 

level. Then, tap the Save soft key.
You can set a level between 0 (no contrast increase) and 4 (noise 

reduction contrast). The default level is 0.

— Sharpness Level—sets the clarity of detail in near-site video.

Press and drag the slider, or tap the Up or Down soft keys, to set the 

level. Then, tap the Save soft key.
You can set a level between 0 (lowest) and 6 (highest). The default 

level is 3.

— Flicker Avoidance—adjusts the flickering (caused by AC power) of 

near-site video captured by the camera sensor.
Tap the Select Environment field’s highlighted box. From the 

drop-down list, tap Auto (to automatically detect flicker), 50 Hz 

(flicker avoidance for Europe and Asia), or 60 Hz (flicker avoidance 

for North America). Then, tap the Save soft key.
The default is Auto.

You can set up your phone so that it handles all video calls in a certain way. 

You can choose to do the following:
• Display all incoming video calls on the full screen or in the window in the 

center of the touch screen. See 

• Change the way video appears in the window in the center of the screen 

and on the full screen. See 

• View full screen video with or without the PIP, and whether to display the 

PIP next to, or over, the full screen video. See 

In addition to setting up your phone to handle all video calls in a certain way, you 
can customize how you view video on a call-by-call basis. For more information on 
customizing video during a call, see